Fixed bugs that was caused by symbols that were defined, but never used.
* 'UnsignedIntConvertToFltSIMD' never used its input parameter.
* The results from the call to 'sq_call' were never checked, so if a failure took place, it was never logged.
* 'CheckForWarnings' never used the 'context' parameter, but this was required as context types of 'eDLL_T::SYSTEM_WARNING' or 'context == eDLL_T::SYSTEM_ERROR', should be returning the warning/error color as well.
* Renamed 'GetHiddenServerConnectStatus' to 'GetHiddenServerName' and added more dedicated error handling within its logic, as the results from the call 'g_pMasterServer->GetServerByToken' was never checked.
Add global define for the clang compiler, and leave non-member 'fltx4' operator functions out when using clang to compile the SDK as these are causing errors. 'fltx4' is a typedef of __m128; not a user defined class, so these operators couldn't be added.
Unfortunately clang-cl doesn't support __FUNCTION__ macro concat. Some SSE stuff in mathlib/navmesh rendering also needs to be made portable at some point.
SourceSDK mathlib port with light modifications.
Renamed Vector to Vector3D (to avoid confusion with std::vector (declared as vector) and Vector2D/Vector4D).
