Travis CI: site documentation update at 2014-11-17 19:53:56 UTC.

Commit: https://github.com/urho3d/Urho3D/commit/8557571cb4dd6b05a24299255bf46c7e21cff1b3

Message: More robust check for OcclusionBuffer culling mode. Now also CULL_NONE mode should detect triangle facing correctly.