fix type, BulletCollisions -> BulletCollision
Thanks to pfanne for the report: https://github.com/bulletphysics/bullet3/issues/168
Merge branch 'master' of https://github.com/erwincoumans/bullet3
add the 'extras' and Bullet 2 tests, to make it easier to create a new intermediate release
fix in Extras/Serialize/BulletFileLoader related to optional endian swap between 64bit and 32bit platforms
Merge remote-tracking branch 'upstream/master'