Travis CI: site documentation update at 2014-04-29 14:09:03 UTC.

Commit: https://github.com/urho3d/Urho3D/commit/8d050480bca3d40aabd1a8f7456117f222a73d9f

Message: Specify the customizable project & executable names on the "Using Urho3D as external library" documentation page. Closes #334.