* added mp_lambda
* launched GHA
* skipped ICE-generating test in GCC < 4.9
* fixed GCC detection in workaround
* test-skipped and documented GCC 4.8 bug
* added missing s/const/CONST
* tempirarily expanded macro to isolate problem with VS2017
* tried workaround for C3546
* tried another workaround
* wrapped workaround up
* dropped unnecessary devoiding in variadic (member) functions
* temporary code to check VS compliance wrt function qualifiers
* removed version printer
* checked compliance with qualified (member) function partial specialization
* checked each partial specialization individually
* wrapped up VS2013 investigation
* left variadics out of VS2013
* skipped noexcept-involving tests for VS2013 (keyword not supported)
* given up on VS2013 support for mp_lambda
* dropped lambda_devoid_args
