Update credits
Also update credit info in the Doxygen page. [ci skip]
Merge branch 'master' of github.com:silverkorn/Urho3D.
For Travis CI - use 'travis_retry' command to improve the odd.
See https://github.com/travis-ci/travis-ci/issues/2000.
[ci skip]
Ensure lib-prefix in static MinGW build. Closes #223.
Add lua_getmainthread function to return main thread.
Add coroutine.start and coroutine.sleep in Lua.
Add Lua coroutine sample.
Add new line at end of file.
Add Sprite2D and Drawable2D.
Add SpriteSheet2D and StaticSprite2D.
Add ParticleEmitter2D.
Add Urho2DSprite sample.
Add script binding for Urho2D.
Add asset for Urho2D.
Add Lua Urho2D Sprite sample.
Add AngelScript api.
Travis CI: API documentation update at 2014-02-27 16:14:04 UTC.
[ci package]
Add Animation2D and AnimatedSprite2D.
Add Animation2D Lua binding.