object program editor

work on the object program editor is going well. i have merged the bits of code i had into zzt++ and am rewriting some stuff. the editor can benefit from some of zzt++'s base functions.

right now i am working on getting the screen cursor synchronised with the memory cursor which is pretty nasty stuff. after that i'll do some work on memory management as well as the editing functions.

last but not least i will work on displaying borders, scrolling and animation.