Replaced Keyboard Module Use For Input

[zander37]

Replaced keyboard module input methods with readchar library in the codebase when necessary. The readchar library solves the issues of global hooks as it only reads characters from stdin. It is Windows and Linux supported. More info here: https://github.com/magmax/python-readchar

Mostly all keyboard module usage was replaced, except for instances of simulating keystrokes, as readchar does not support keystroke simulation.

Usage of python's input() was kept, as it doesn't cause global hooks, as it reads from stdin like readchar, but reads the whole line.

For Issue: unhandled keyboard sabotaging (urgent) #145