Travis CI: site documentation update at 2014-01-18 19:04:39 UTC.

Commit: https://github.com/urho3d/Urho3D/commit/eb4e99457c730a64c3c0ff189f5e0d34ed91d2cc

Message: Code cleanup. Removed Camera functions to return forward, right, up vectors as they are now also in Node. Added Lua property accessors for Node up/right vectors. Exposed SmoothStep() to script. Modified Node::LookAt() to use the new Quaternion function. Updated credits.