Travis CI: site documentation update at 2014-05-14 12:16:58 UTC.

Commit: https://github.com/urho3d/Urho3D/commit/bf6a054ac4c082634c4b8dd2ea9cc04d0c62ef65

Message: Use ordinary DRAWABLE_GEOMETRY flag on 2D drawables so that they can be raycasted against. Use a DRAWABLE_PROXYGEOMETRY flag on DrawableProxy2D so that it won't show up in normal raycasts or octree queries. Fixes #345.