Travis CI: site documentation update at 2014-02-06 15:44:28 UTC.

Commit: https://github.com/urho3d/Urho3D/commit/f2c3d8fe5d7375ee1270005c297961a853b11948

Message: Clear persistent float screenbuffers to ensure their contents aren't undefined. This fixes the AutoExposure effect on OpenGL. Added missing float textures to OpenGL Texture::GetDataType().