Spear for example.
Merge pull request #38 from executionunit/master

VS2010 build and Fix for Negative Scale in X
Fixed up remaining issues to make spine-c C89.
Support new libgdx JSON stuff. Alpha for slot lines with debug renderer.
Reenable spineboy.
Fixed up conversion warnings in VS2010.
Renaming project files to lowercase.
Renaming project files to lowercase.
Removed ReadMe.txt.
Ctor for C++.
Fixed issue #36.
Fix for including in .mm file.