Added some skeletons, found an issue

[Todo]
as before
implement skeletons, of course
fix issue, traceback [...]

[Changelog]
+stop(who) <-- Stop specific canvas item
+hide(who) <-- Hide specific canvas item
+atWorldEdge(who) -> bool <-- Gives true if at worlds edge
Ignore .swp files aka vim swap files
Fixed issue.
canvas.addtag_withtag(Item, tagtoadd) --> canvas.addtag(tagtoadd, 'withtag', item)
Some minor changes, not completed
atWorldEdge() -> behindWorldEdge() implemented
Removed debug information