big commit
trying to abstract fs
renamed archives to fs. added stub for shared extdata
added some docs
various fs fixes
fixed some fs bugs
shared_extdata progress
Merge branch 'master' of https://github.com/plutooo/3dmoo
Merge branch 'dev'

Conflicts:
	Makefile
	src/loader.c
	src/services/fs_user.c
fixed extdata bug
Merge branch 'master' of https://github.com/plutooo/3dmoo