Travis CI: site documentation update at 2014-04-18 20:53:21 UTC.

Commit: https://github.com/urho3d/Urho3D/commit/955a8bb34e30ce001accbafb79511910226d380d

Message: Joystick refactoring after merging the joystick pull request from thebluefish.
- Fixed "ghost" buttons due to setting button down state both by joystick button and controller button mapping.
- Fixed missing name in joystick state.
- Allow getting joystick state both by joystick ID (Input::GetJoystick()) and a zero-based index (Input::GetJoystickByIndex()).
- Fixed ambiguity in Input class parameter names whether functions take a joystick ID, or an index. Most take joystick ID by now.
- Controller events removed. Controller joysticks will receive ordinary joystick events, but with controller axis & button mappings.
- Joystick identifying parameter in joystick events changed to JoystickID to denote that it's an ID and not a zero-based index.
- Code convention edits to Input code.