Added alternative keybinds for left handed use.

[SleepingCrows]

Modified keyPressEvent() to include alternative keys for left handed use with or modifiers. :heavy_check_mark:

Also updated the readme to reflect the additional keys & some readability changes. May be better moving all mentioned hotkeys into an unordered list or table for faster reference :bulb:

[matjojo]

This looks very nice. If we ever get a user that prefers the RHS of the keyboard but still doesn't want to use arrows I'll see about moving the keys to three sets. That should clean up the code somewhat.

[SleepingCrows]

This looks very nice. If we ever get a user that prefers the RHS of the keyboard but still doesn't want to use arrows I'll see about moving the keys to three sets. That should clean up the code somewhat.

Moving the keybinds to a configuration file may probably be best in the end if it comes down to letting the user customize their keybinds.