Updated license to version 2.

Version 1 of the license didn't make sense: it required a Spine license to use the Spine Runtimes at all. This means if you used the Spine Runtimes in your application, anyone who purchased a copy of your application also needed a Spine license to use the runtimes. This was not the intent!

Version 2 of the license fixes this by allowing anyone to use the Spine Runtimes but only for internal use. When you purchase Spine, the Spine license (http://esotericsoftware.com/spine/files/license.txt) grants you the right to make and distribute derivative works of the Spine Runtimes. Now it makes sense: making and distributing applications with the Spine Runtimes requires a Spine license, but anyone can run that software without needing a Spine license.

With this fixed, I hope we never need to change the license again!

LICENSE

@@ -1,30 +1,25 @@
-Spine Runtime Software License - Version 1.0
+Spine Runtimes Software License
+Version 2
 
 Copyright (c) 2013, Esoteric Software
 All rights reserved.
 
-Redistribution and use in source and binary forms in whole or in part, with
-or without modification, are permitted provided that the following conditions
-are met:
-
-1. A Spine Essential, Professional, Enterprise, or Education License must
-   be purchased from Esoteric Software and the license must remain valid:
-   http://esotericsoftware.com/
-2. Redistributions of source code must retain this license, which is the
-   above copyright notice, this declaration of conditions and the following
-   disclaimer.
-3. Redistributions in binary form must reproduce this license, which is the
-   above copyright notice, this declaration of conditions and the following
-   disclaimer, in the documentation and/or other materials provided with the
-   distribution.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+You are granted a perpetual, non-exclusive, non-sublicensable and
+non-transferable license to install, execute and perform the Spine Runtimes
+Software (the "Software") solely for internal use. Without the written
+permission of Esoteric Software, you may not (a) modify, translate, adapt or
+otherwise create derivative works, improvements of the Software or develop
+new applications using the Software or (b) remove, delete, alter or obscure
+any trademarks or any copyright, trademark, patent or other intellectual
+property or proprietary rights notices on or in the Software, including
+any copy thereof. Redistributions in binary or source code must include
+this license and terms. THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTARE BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.