[engine]Issue #116: Refactor to give input integers a meaning
[engine]Issue #116: Use debug log tag for error
[engine]Issue #116: Use debug log tag for ok header
[engine]Issue #116: Use debug log tag for info header
[engine]Issue #116: Use debug log tag for warning header
[engine]Issue #116: Use debug log tag for begin header
[engine]Issue #116: Use debug log tag for end header
[engine]Issue #116: Use debug log tag for places where missed before
[engine]Issue #116: The fix itself which was breaking the log format. Wrong API was used, and C++ allows for silent casting from int to bool :(