CMake with MinGW

Made some include paths unambigeous, Moved Reflection.h to Foundation #1779

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Run time

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Job	Run time
${ matrix.sys }} (mingw32, i686, Release)	7m 3s
${ matrix.sys }} (mingw32, i686, Debug)	5m 55s
${ matrix.sys }} (mingw64, x86_64, Release)	6m 31s
	19m 29s