Travis CI: site documentation update at 2014-03-26 00:02:39 UTC.

Commit: https://github.com/urho3d/Urho3D/commit/f6c96c2f9fc734a366fd332a9cb10ec05413cee9

Message: Simplify defining Vector2,3,4::ZERO. Consistency for the up direction parameter name in Node::LookAt() & Quaternion::FromLookRotation().