Merge branch '4.0' into 4.1-beta

# Conflicts:
#	examples/raptor/export/raptor-pma.png
#	examples/raptor/export/raptor-pro.json
#	examples/raptor/export/raptor-pro.skel
#	examples/raptor/export/raptor.png
#	spine-ue4/Content/GettingStarted/Assets/Raptor/Textures/raptor.uasset
#	spine-ue4/Content/GettingStarted/Assets/Raptor/raptor.json
#	spine-ue4/Content/GettingStarted/Assets/Raptor/raptor.png
#	spine-ue4/Content/GettingStarted/Assets/Raptor/raptor.uasset
#	spine-ue4/Content/GettingStarted/Assets/Spineboy/Textures/spineboy.uasset
#	spine-ue4/Content/GettingStarted/Assets/Spineboy/spineboy.json
#	spine-ue4/Content/GettingStarted/Assets/Spineboy/spineboy.png
#	spine-ue4/Content/GettingStarted/Assets/Spineboy/spineboy.uasset

spine-ue4/Content/GettingStarted/Assets/Spineboy/spineboy.json

@@ -1,7 +1,7 @@
 {
 "skeleton": {
-	"hash": "ttp88nCyPm0",
-	"spine": "4.1.04-beta",
+	"hash": "IQgkYFQG8ng",
+	"spine": "4.0.61",
 	"x": -188.63,
 	"y": -7.94,
 	"width": 418.45,
@@ -2427,19 +2427,19 @@
 			"side-glow1": {
 				"attachment": [
 					{ "name": "hoverglow-small" },
-					{ "time": 0.9667 }
+					{ "time": 0.9667, "name": null }
 				]
 			},
 			"side-glow2": {
 				"attachment": [
 					{ "time": 0.0667, "name": "hoverglow-small" },
-					{ "time": 1 }
+					{ "time": 1, "name": null }
 				]
 			},
 			"side-glow3": {
 				"attachment": [
 					{ "name": "hoverglow-small" },
-					{ "time": 0.9667 }
+					{ "time": 0.9667, "name": null }
 				]
 			}
 		},
@@ -3479,68 +3479,60 @@
 				{ "mixX": 0, "mixScaleX": 0, "mixShearY": 0 }
 			]
 		},
-		"attachments": {
+		"deform": {
 			"default": {
 				"front-foot": {
-					"front-foot": {
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-								"vertices": [ -0.02832, -5.37024, -0.02832, -5.37024, 3.8188, -3.7757, -0.02832, -5.37024, -3.82159, 3.77847 ]
-							}
-						]
-					}
+					"front-foot": [
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+							"vertices": [ -0.02832, -5.37024, -0.02832, -5.37024, 3.8188, -3.7757, -0.02832, -5.37024, -3.82159, 3.77847 ]
+						}
+					]
 				},
 				"front-shin": {
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+					"front-shin": [
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+						},
+						{
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+						},
+						{
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+							"offset": 14,
+							"vertices": [ 0.5298, -1.12677, -0.85507, -4.20587, -7.00775, -8.24771, -6.45482, -6.49312, -6.06447, -6.89757, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.54892, -3.06021, 1.48463, -2.29663, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -4.80437, -7.01817 ]
+						},
+						{
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+							"offset": 14,
+							"vertices": [ 0.5298, -1.12677, -0.85507, -4.20587, -11.35158, -10.19225, -10.79865, -8.43765, -6.06447, -6.89757, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.54892, -3.06021, 1.48463, -2.29663, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -4.80437, -7.01817 ]
+						}
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 				},
 				"hoverboard-board": {
-					"hoverboard-board": {
-						"deform": [
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+					"hoverboard-board": [
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+							"curve": [ 0.45, 0, 0.817, 1 ]
+						},
+						{ "time": 1 }
+					]
 				},
 				"rear-foot": {
-					"rear-foot": {
-						"deform": [
-							{
-								"offset": 28,
-								"vertices": [ -1.93078, 1.34782, -0.31417, 2.33363, 3.05122, 0.33946, 2.31472, -2.01678, 2.17583, -2.05795, -0.04277, -2.99459, 1.15429, 0.26328, 0.97501, -0.67169 ]
-							}
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+					"rear-foot": [
+						{
+							"offset": 28,
+							"vertices": [ -1.93078, 1.34782, -0.31417, 2.33363, 3.05122, 0.33946, 2.31472, -2.01678, 2.17583, -2.05795, -0.04277, -2.99459, 1.15429, 0.26328, 0.97501, -0.67169 ]
+						}
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 				}
 			}
 		}
@@ -5211,7 +5203,7 @@
 			"portal-bg": {
 				"attachment": [
 					{ "name": "portal-bg" },
-					{ "time": 3 }
+					{ "time": 3, "name": null }
 				]
 			},
 			"portal-flare1": {
@@ -5222,7 +5214,7 @@
 					{ "time": 1.2, "name": "portal-flare1" },
 					{ "time": 1.2333, "name": "portal-flare2" },
 					{ "time": 1.2667, "name": "portal-flare1" },
-					{ "time": 1.3333 }
+					{ "time": 1.3333, "name": null }
 				]
 			},
 			"portal-flare2": {
@@ -5232,14 +5224,14 @@
 					{ "time": 1.1667, "name": "portal-flare1" },
 					{ "time": 1.2, "name": "portal-flare2" },
 					{ "time": 1.2333, "name": "portal-flare3" },
-					{ "time": 1.2667 }
+					{ "time": 1.2667, "name": null }
 				]
 			},
 			"portal-flare3": {
 				"attachment": [
 					{ "time": 1.2, "name": "portal-flare3" },
 					{ "time": 1.2333, "name": "portal-flare2" },
-					{ "time": 1.2667 }
+					{ "time": 1.2667, "name": null }
 				]
 			},
 			"portal-flare4": {
@@ -5247,33 +5239,33 @@
 					{ "time": 1.2, "name": "portal-flare2" },
 					{ "time": 1.2333, "name": "portal-flare1" },
 					{ "time": 1.2667, "name": "portal-flare2" },
-					{ "time": 1.3333 }
+					{ "time": 1.3333, "name": null }
 				]
 			},
 			"portal-flare5": {
 				"attachment": [
 					{ "time": 1.2333, "name": "portal-flare3" },
 					{ "time": 1.2667, "name": "portal-flare1" },
-					{ "time": 1.3333 }
+					{ "time": 1.3333, "name": null }
 				]
 			},
 			"portal-flare6": {
 				"attachment": [
 					{ "time": 1.2667, "name": "portal-flare3" },
-					{ "time": 1.3333 }
+					{ "time": 1.3333, "name": null }
 				]
 			},
 			"portal-flare7": {
 				"attachment": [
 					{ "time": 1.1333, "name": "portal-flare2" },
-					{ "time": 1.1667 }
+					{ "time": 1.1667, "name": null }
 				]
 			},
 			"portal-flare8": {
 				"attachment": [
 					{ "time": 1.2, "name": "portal-flare3" },
 					{ "time": 1.2333, "name": "portal-flare2" },
-					{ "time": 1.2667 }
+					{ "time": 1.2667, "name": null }
 				]
 			},
 			"portal-flare9": {
@@ -5281,7 +5273,7 @@
 					{ "time": 1.2, "name": "portal-flare2" },
 					{ "time": 1.2333, "name": "portal-flare3" },
 					{ "time": 1.2667, "name": "portal-flare1" },
-					{ "time": 1.3 }
+					{ "time": 1.3, "name": null }
 				]
 			},
 			"portal-flare10": {
@@ -5289,25 +5281,25 @@
 					{ "time": 1.2, "name": "portal-flare2" },
 					{ "time": 1.2333, "name": "portal-flare1" },
 					{ "time": 1.2667, "name": "portal-flare3" },
-					{ "time": 1.3 }
+					{ "time": 1.3, "name": null }
 				]
 			},
 			"portal-shade": {
 				"attachment": [
 					{ "name": "portal-shade" },
-					{ "time": 3 }
+					{ "time": 3, "name": null }
 				]
 			},
 			"portal-streaks1": {
 				"attachment": [
 					{ "name": "portal-streaks1" },
-					{ "time": 3 }
+					{ "time": 3, "name": null }
 				]
 			},
 			"portal-streaks2": {
 				"attachment": [
 					{ "name": "portal-streaks2" },
-					{ "time": 3 }
+					{ "time": 3, "name": null }
 				]
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 		},
@@ -7704,7 +7696,7 @@
 					{ "time": 0.1, "name": "muzzle03" },
 					{ "time": 0.1333, "name": "muzzle04" },
 					{ "time": 0.1667, "name": "muzzle05" },
-					{ "time": 0.2 }
+					{ "time": 0.2, "name": null }
 				]
 			},
 			"muzzle-glow": {
@@ -7733,7 +7725,7 @@
 				],
 				"attachment": [
 					{ "time": 0.0333, "name": "muzzle-ring" },
-					{ "time": 0.2333 }
+					{ "time": 0.2333, "name": null }
 				]
 			},
 			"muzzle-ring2": {
@@ -7747,7 +7739,7 @@
 				],
 				"attachment": [
 					{ "time": 0.0333, "name": "muzzle-ring" },
-					{ "time": 0.2 }
+					{ "time": 0.2, "name": null }
 				]
 			},
 			"muzzle-ring3": {
@@ -7761,7 +7753,7 @@
 				],
 				"attachment": [
 					{ "time": 0.0333, "name": "muzzle-ring" },
-					{ "time": 0.2 }
+					{ "time": 0.2, "name": null }
 				]
 			},
 			"muzzle-ring4": {
@@ -7775,7 +7767,7 @@
 				],
 				"attachment": [
 					{ "time": 0.0333, "name": "muzzle-ring" },
-					{ "time": 0.2 }
+					{ "time": 0.2, "name": null }
 				]
 			}
 		},