Merge pull request #73 from Kuang11/master

Added additional attributes to btRigidBodyConstructionInfo
make it easy to add more includes, and add btHeightfieldTerrainShape.h
disable memory init file, we prefer a single file for ammo
updated build
Added getRotation() to btMatrix3x3
Merge pull request #76 from Bunzaga/patch-2

Added getRotation() to btMatrix3x3
Many additions to ammo.idl including shapes, constraints, character controller, ghost objects, vehicle related attributes and more
Merge pull request #77 from gentooist/idl-additions

Many additions to ammo.idl including shapes, constraints, character cont...
merge