fix build error in SupportFuncDemo.h
add support to btHingeConstraint to set/get ERP, example use:
hinge->setParam(BT_CONSTRAINT_ERP,0.5);
btScalar erp = hinge->getParam(BT_CONSTRAINT_ERP);
Also, preliminary support for status bar messages in demo framework.
fix double precision build
Added a basic COLLADA .dae importer mainly to support URDF loading (URDF can refer to COLLADA .dae or STL .stl for mesh support)
It is fairly limited, only supports loading <geometry> with triangulated meshes, no material loading
I will extend this with COLLADA Physics support.
fix mac build
remove unnecessary header
add basic concept demo, Coordinate System for a start.
set the up axis for some of the demos.
fix build
Merge branch 'master' of https://github.com/erwincoumans/bullet3
Merge remote-tracking branch 'upstream/master'