Travis CI: API documentation update at 2014-03-19 07:39:45 UTC.
[ci package]
Add URHO3D_API to BufferedSoundStream. [ci skip]
Replace plist particle file with Staring extension particle system (pex).
Add greenspiral particle file.[ci skip]
Simplify sound stream code and improve the SoundSynthesis sample. Closes #257.
Added documentation for the sound streaming feature.
Fixed typo and improved SoundSynthesis example comments.
Updated to LuaJIT 2.0.3. Closes #266.
Fix particle emitter, add radial particle in sample.
Build both armeabi and armeabi-v7a ABIs when packaging for Android.

- Fix android toolchain to correctly set the library output path when ANDROID_ABI build option changes.
- For Travis CI - download and setup Android SDK on the fly when performing Android packaging.
- Final apk is included in the binary package.
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]