Merge pull request jchanvfx#264 from jchanvfx/replace_toTuple_getRgb_…

…#262

replace toTuple() with getRgb() method on QColor jchanvfx#262

clear key states on dialog prompt.

Update README.md

removed pyqt5 requirement.

doc tweak

doc updates

doc formatting fixes

Merge pull request jchanvfx#213 from jchanvfx/cleanup

clean up

docs

doc updates