Added version of jme that supports shape keys.

src/docs/asciidoc/jme3/external/blender/blender_gltf.adoc

@@ -58,7 +58,9 @@ All of the rules associated with defining materials in Blender suitable for use
 Shape keys in Blender are used to apply a deformation to a mesh without changing the underlying vertices. The glTF exporter ignores shape keys unless they are part of an animation. To include shape keys in the export, select the `Shape Keys` option in the `Animation` tab of the glTF export options.
 
 [NOTE]
-Shape keys are only supported in jME 3.3
+====
+Shape keys are supported as of jME version 3.3.0-beta2+. Use the PBRLighting.j3md material definition when doing so.
+====
 
 == Export options
 

src/docs/asciidoc/jme3/terminology.adoc

@@ -186,6 +186,12 @@ Creating a texture for a cube is easy – but what about a character with a face
 Getting the seams and mappings right is crucial: You must use a graphic tool like Blender to create UV Maps (Texture Atlas) and store the coordinates correctly. It's worth the while to learn this, UV mapped models look a lot more professional.
 --
 
+* *Albedo Maps*
++
+--
+Albedo maps are similar to Diffuse maps with the exceptions that they don't have shadows or highlights. They are used as the base color of a PBR material.
+--
+
 === Environment Mapping