kjhammerle/core: Kajetans C++ standard library without any C++ dependencies @ 5445ff07d8fb8526829007d9bcd3a59097b548a4

Kajetan Johannes Hammerle 493b3be1e7 Use return values instead of the error callback		2 lat temu
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Main.cpp	493b3be1e7 Use return values instead of the error callback	2 lat temu
Test.cpp	493b3be1e7 Use return values instead of the error callback	2 lat temu
Test.h	493b3be1e7 Use return values instead of the error callback	2 lat temu