Travis CI: site documentation update at 2014-11-08 07:30:36 UTC.

Commit: https://github.com/urho3d/Urho3D/commit/1edc6bfe642cd02851b161d7a7c7dd0e420fa41f

Message: Append '_d' to the output executable file name in the example.
Related to commit 78436eecd4648410c21ad5f0171bc93b28eca20a.