fixes, features, etc

-part is now fully functional
-added hooks into certain parts of pac to centralize code in vfs part
and allow future case-by-case modification of saved parts and creating
part tables
-part no longer has a forward value, this is instead set when you create
the json archive and stored within it (so you just give it a URL and go)

-also move the pac tool line below the tools someone added because it's
always supposed to be at the bottom