Merged dev branch into main. Whilst the game can no longer be launched
and played, I feel that concentrating functionality on the editor is
more important until the worlds can be created whole cloth. Then, better
gameplay testing and development can be done.
User can now create new screens in the world.
Bonzo starting location can now be set in the editor. Additionally, the
editor will display a transparent version of bonzo where his starting
location is.
Sprite editor can now add sprites. Editor interface attempts to make
this easy, but it is using the old school 'enter value style', which
will remain for the time being (so it is easier to port old levels)
Also, there is currently no way to 'remove' or 'edit' a sprite once
added to the world.
Initial Commit ready for Github