Refactoring/PC GUI Update
- Removed AbstractNote*
- Removed INoteTitle, INoteContent - all Content is now stored in the INote itself as String
- Reflected Changes to BasicNote
- Updated Model to use <INote> Instead of <String title, String content> and switched to a LinkedList
- Settings Dialogue Updated:
  - Added Username, Password Field
  - Added Save Login Checkbox
  - Added Login, Create, Reset Password
- Tidied up a bit