Fix build script to include Urho3D.apk only for Urho3D project.
[ci package]
Fix gravity and rotation in ParticleEmitter2D.
For Travis CI - script clean up. [ci skip]
Fix the logic to suppress all warnings for iOS CI build. [ci skip]
Add more Constraint2D. [ci skip]
Add Lua binding for Constraint2D.
Travis CI: API documentation update at 2014-03-20 11:14:08 UTC.
[ci package]
Revert back the condition as the issue is with Travis CI OSX build env.
[ci skip]

A new issue is opened at their repo: https://github.com/travis-ci/travis-ci/issues/2085.
If it could not be resolved quickly then we will force to export that environment variable in our own .travis.yml file.
Add simple attribute animation system, and change StaticScene to test it.
Add commend and use shared ptr for attribute animation. [ci skip]
Add possibility to decouple BorderImage border UV size from screen size. Closes #269.
Travis CI: API documentation update at 2014-03-20 20:38:47 UTC.
[ci package]
Sync at 2014-03-21 09:48:20 +0800.