New functionality

• Ability to stop overriding CMAKE_CXX_FLAGS_DEBUG/CMAKE_CXX_FLAGS_RELEASE which is important for Android as it uses a lot of extra flags. Set the OVERRIDE_CXX_FLAGS=NO cmake flag to enable this.
• Reduced size of a contact constraint which saves a bit of memory during simulation.
• Can now build a linux shared library using GCC.

Bug fixes

• Fixed mass scaling (as provided by the ContactListener) not applied correctly to CCD objects & during solve position constraints. This led to kinematic objects being pushed by dynamic objects.
• Workaround for MSVC 17.8, limits.h doesn't include corecrt.h and triggers an error that __STDC_WANT_SECURE_LIB__ is not defined.
• Fixed bug in MustIncludeC logic in GetClosestPointOnTriangle.
• Removed the need for specifying -Wno-comment when compiling with GCC.