Since these are just interpreted comments, there's 0 impact on actual code. This removes all lines that match /* vim: set(.*)tw=80: */ with S&R -- there are a few others scattered around which will be removed manually in a second part.
- Moves scripting parts of DOM into 'dom/script' - Renames nsScript{Loader/Element} to Script{Loader/Element} - Adjusts all callers