[ref #112] The macro "ENABLE_DEBUG_IMAGE" is now set depending on the cmake configuration

That means that it is defined in debug builds and not in release builds.
Added comments to all GUI-headers
Merge branch 'master' of https://github.com/augmented-go/augmented-go
Moved all GUI classes into the Go_GUI namespace
Doxygen comments!
Fixed the "can_get_differences_of_faulty_moves" unit test

#76 allows any player to play after a init with a non-empty setup, so this testcase was removed
Documentation for cv::Point comparison functor and the board coordinate mapping function

Also removed unused functions
AugmentedView class doku
Ref #146 - Removed "Threshold" and "Rules" from settings menu
Merge pull request #152 from augmented-go/#146_remove_unused_menuitems

Ref #146 - Removed "Threshold" and "Rules" from settings menu
ref #116 - doxygen documentation of header files
add doxygen config for generating documentation (with and without diagrams)

diagrams need the dot-tool from the graphviz package available in PATH
Merge remote-tracking branch 'remotes/origin/Go_Scanner'

Conflicts:
	Go_Scanner/detect_stones.hpp
[refs #17] Tweak parameters for automatic board detection
Merge branch 'master' into #74_board_detect_usability

Conflicts:
	Go_Scanner/detect_board.hpp