Bug fixes

Changes to basically anything in lua/starfall. So, editor, compiler, preprocessor, sflib, etc.
Changes:
* GetType function to check SF types without it automatically throwing an error. Also fixes type()
* Fix highlighting in editor
* General bug fixes
* Removes executable flag from callback.lua... (Why the heck was it even set?)
* New indicator for players having the editor open (Falling stars instead of rising cogs)