After a while I felt that putting underscores between words was not the
best solution, so I changed the underscores to capital letters.
Fixed consistency bug between POSIX/Win32 platform in BH_FileOpen.
Removed definitions for math types (vector, matrix, etc.) due to
potential aliasing issues.
Added Asan profile to help catch and fix various bugs (and indeed, there
were few of them).
Additionally, fixed bhunit macro to process arguments only once.