refactors atom/var/flags to atom_flags and area_flags
moves NOBLOODY, NOBLUDGEON, and PHORONGUARD to item_flags instead of atom_flags
corrects various misapplied flags
* Add proper custom arrows. (cross)Bows "render" proper arrows over themselves in inventory and on ground. Hardlight bow no longer deletes other arrows on removal.
* Fix subtyping issue.
Add Chitin arrow type.
* Remember to hit save, kids.
* Fixfix. Add true Unga arrow utilizing the Ancient Art of Sharp Rocks.
NB. In some cases we go from a more complex image() to a single icon_state string and I assume this works for every case but do not care to check because of the sheer scale of extra fiddly effort. Buyer beware, not my code.
* get_tool_quality has numerical meaning
* Basic tools set tool quality
* Toolspeed is replaced by tool quality checks
* Addresses assorted results from live test
* Extra cleanup
