Fixed CONSTEXPR definitions.
Converted EFontImportFlags to an enum class in order to test this feature.
#codereview robert.manuszewski,john.barrett
[CL 2254804 by Steve Robb in Main branch]
#proj core
#branch UE4
#summary Rename Trunc, Round, Floor, Ceil to TruncToInt, RoundToInt, FloorToInt, CeilToInt. Added *ToFloat versions. Repeated for FGenericPlatformMath and all derived classes for all platforms wherever applicable. Corrected comment in Fractional and added Frac() which does HLSL-style fractional (x - floor(x)). Checked for compilation on all projects (with cooking levels wherever applicable). Didn't change Fractional to Frac, this will be done in second commit.
#codereview robert.manuszewski
[CL 2064306 by Mikolaj Sieluzycki in Main branch]
- Fixed profiler
- Increased stack size used to generate the profiler event graph
- Fixed a problem with tracking default stats when the metadata is not ready
#codereview Robert.Manuszewski
[CL 2048708 by Jaroslaw Surowiec in Main branch]
