Coding - PCH improvements #125

Job	Run time
Prepare and Build on Ubuntu with Clang (x64)	17m 17s
Prepare and Build on Ubuntu with GCC (x64)	24m 34s
Prepare and Build on macOS with GCC (x64)	9m 51s
Prepare and Build on macOS with Clang (x64)	9m 36s
Prepare and Build on Windows with Clang (x64)	23m 37s
Prepare and Build on Windows with MSVC (x64)	14m 7s
Test on macOS (x64)	1m 45s
Test on macOS with GCC (x64)	1m 43s
Test on Windows (x64)	1h 54m 22s
Test on Linux with Clang (x64)	31m 40s
Test on Windows with Clang (x64)	1h 49m 7s
Test on Linux with GCC (x64)	32m 32s
Summarize and Send PR Message	9m 17s
	6h 39m 28s

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