Adds keyboard support! Defines the following functions
* key_state
* key_wait
* type
* send
* send_raw
* send_input
* send_play
* send_event
* key_press
* key_release
* key_down
* key_up
Other changes:
Hotkeys moved to keyboard module
keys module
debugging/logging instructions now accurate
suppress StopIteration error when using find_windows* functions when window not found