Add beat reset button

[rumblesan]

Having movement linked with the BPM and the beats is going to be great, but it's possible for the two to go of sync. not by parts of a beat, but a whole beat.

i.e. the beat pattern you created was an odd number of beats, and now the rotation "beat" is starting on the second music pattern "beat". a way of resetting the beat count to zero would help fix this

[Richard-Mineall]

Should be easy to do just basically run a quick-save-quick-load, but first we need a way to save and load codes that the user has made