* introduce doctest over googletest #202
* call dtester in in targets
* doctest conversion #202
* channel.cpp -> doctest #202
* egcpool tests -> doctest #202
* input tests to doctester
* zaxis -> doctest
* drone: always define LANG
* libav to doctest #202
* panelreel tests to doctest #202
* spec that a C++17 compiler is now required for doctest #202
* enmetric tests -> doctest #202
* fade tests -> doctest #202
* notcurses test case -> doctest #202
* last conversion to doctest #202
* finish move to doctest #202
* drone: set up make test
* planereels tester #180
* suppress_banner in all tests
* tabletcb: start passing back tablet
* properly initialize fbbytes stat
* panelreel: logic fixes#178
* install all testing data
* uniblock-demo: reset background to black
* warning about quantization
* some luigi love
* update cell documentation
* add unit test for move of stdplane
* MoveToLowerRight unit test
* ncplane_move_yx(): error to move stdscr
* better box permutations test
* luigi in megaman2 world
* stats: don't print 'em if we haven't got 'em
Add the necessary input buffer, non-blocking reads, escape trie,
and unit tests to support extended keys, including arrow keys.
Update notcurses-input to print Unicode Control Glyphs instead of
a blank space for control chars.
* sliding: bounding box around puzzle
* slider: make moves, deleting planes #61
* implement z-index move functions
* demo: allow demos to be chosen via command-line option
* allow default bg/fg to be explicitly chosen
* ncplane_resize() unit test #64
* useful links
* slider: use random colors
* use find_above() in ncplace_destroy()
* ncplane_resize() work #64
