Travis CI: site documentation update at 2014-03-01 12:17:55 UTC.

Commit: https://github.com/urho3d/Urho3D/commit/0628d61af6864fd1d991b5b17ccfd5d7ee9c4a6d

Message: Do not update/clone material in UpdateBatches(), as it's called from a worker thread. Instead update material earlier on demand.