Add transform functions for Urho2D.
Restructure the D3D9 GPU flush: after presenting, first wait for previous frame's query, then issue new query. To prevent a loop of device loss and window flicker, do not attempt to render on D3D9 when the window is minimized in fullscreen mode.
Remove Node's Lua scalar transform functions, like SetPositionXYZ.
Travis CI: API documentation update at 2014-04-30 15:25:24 UTC.
[ci package]
For Travis CI - switch CI build to use OS X build environment.