Dezzles

@edenkl8 The merge quad trees funcationality was added as part of https://github.com/CodingTrain/QuadTree/pull/24, but the removal functions would still be an excellent addition

I think breaking things up into separate files and having a build system is a good idea, I've not done that step before so I'd be keen to have a...

Screenshots of changes below  Note that in the below screenshot the fretbar is scrollable  Noticed while grabbing screenshots that I'd accidentally changed landing page. Will fix this evening

I'm planning on adding some more instruments and tuning this week, will look at including this in the PR