Feature OS interface

See merge request !41

# Conflicts:
#   src/Main.java

Feature rebind keys

See merge request !40

Added unregistration of all hotkeys on thread loop exit.

Add UI to feature branch

See merge request !38

Values added to keyValueMap, currently printing to console for unit testing. Not linked to backend yet.

Implemented sendKey

Added ability to stop runnable loop.

Implemented thread methods to handle processing on the separate thread.

Use the Modifier enum to generate the value.

# Conflicts:
#	src/model/Modifier.java

This reverts commit 505635a9

This reverts commit 3072cd4c

This reverts commit df676635

This reverts commit dace1b8d

This reverts commit 4edde339

This reverts commit 00fafe28