Only receive contact event when physics stepping.
Add degree math function, fix scale time when speed < 0.
Travis CI: API documentation update at 2014-04-17 10:35:33 UTC.
[ci package]
Fix bug in ConstrainMouse2D.
Fixed bug of set target call order.
add an option for exporting the scene meshes even if they are identical with the others
Code cleanup, renamed command line option. Updated AssetImporter documentation.
conflicts fixed