Touch relative to viewport

[mruac]

This PR functionally turns the entire viewport into a d-pad, which makes moving the character easier on mobile, rather than moving by tapping next to the character currently.

An option is made in the settings to allow the user to switch between the different move types for mobile. Doesn't affect desktop users I think.

Fixes #89 - Not sure if the mobile user will need a separate d-pad since the entire viewport now functions as the d-pad.

_{Don't mind the merge commit because I had not matched the code formatting properly}