v0.6.0

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