2.83
Update Test_v3interp.cpp
fix Linux build
add BspDemo.bsp data file add sphere2.urdf move btSpatialAlgebra into LinearMath remove some warnings, introduce BT_ZERO, BT_ONE, BT_HALF as defines for 0.f/0., 1.f/1., 0.5f/0.5 respectively
fix linux build (case sensitive folder Test -> test etc)
reorder files, in preparation for Bullet 3 -> Bullet 2 merge
Add option to use clew to manually open the OpenCL dynamic library fix Linux build of App_Bullet3_OpenCL_Demos. Unfortunately the simulation doesn't work properly, need to fix it (and add unit tests)
add CMake support to build gtest