Add user feedback capability to the Native SDK #18

Job	Run time
Xcode Build for iOS	56s
Linux (old gcc, 32-bit)	1m 37s
Lint	22s
Linux (new gcc)	4m 15s
Linux (clang + asan + llvm-cov)	5m 6s
Linux (clang + kcov)	24m 3s
Linux (gcc + code-checker + valgrind)	5m 40s
macOS (xcode llvm)	7m 9s
macOS (xcode llvm + universal)	11m 33s
macOS (clang + asan + llvm-cov)	10m 42s
Windows (old VS, 32-bit)	7m 44s
Windows (latest)	6h 0m 18s
LLVM-Mingw	6h 0m 17s
Android (old API/NDK)	4m 29s
Android (new API/NDK)	5m 5s
Create Release Archive	0s
	13h 29m 16s

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