Merge pull request #309 from Fenrisul/master

[Unity] Updated Eye Constraint example, atlas was broken from 1.9.17 export?
Fixed ANSI C compilation.
Merge remote-tracking branch 'origin/master'
Added images path to nonessential data.
Merge pull request #310 from Fenrisul/master

[Unity TK2D] Brought TK2D inline with native Unity runtime
Merge remote-tracking branch 'origin/master'
Docs
Skeleton data is optional.
Removed unused local.
Updated projects for latest cocos2d-iphone.

v2 is 2.1.0
v3 is 3.2.1
Renamed 3.0 to 3.
[Unity TK2D] Workflow improvements and bugfixes