Minor refactor to declutter MainDriver a bit.
Abstracted JSON reading and writing ability for any file instead of just for StaffElements only. Removed old code from rootlayoutcontroller.
Added Login side pane to enable users to login to a profile. Added Initial achievement model. Changed the name of MusicView.fxml to Music.fxml to maintain consistency with other fxml files. Added package "Connector" to allow the desktop application to talk to a remote server.
Changed method names for more clarity as to what they do. Redesigned the Rhythm UI. Minor Tweaks to the login UI.