cleanup

added tk dependency to readme

Added a desktop file to the example

updated to python 3.9

add detection and handling of device disconnect (also renamed private functions / fields)

disabled gui and improved some things

added support for simultaneous midi events

cleanup/bugfix

moved gui out of midi_macro package

moved example code to example package

improved separate package, functions are now passed as a class

small fix

move midi functions to separate package

moved main logic to separate class so different functions.py can be passed

fixed small bug