Various fixes and additions...

Made the inventory a specific list. Moved the anchored
variable to be able to affect all movable atoms. Added a
'robustness' variable to limbs-- Will make the health
reading on the statpanel more vague soon. For now, it simply
reduces damage. Changed the inventory statpanel to use inventory
instead of contents. Added picking up, setting down, ingesting food,
searching, and harvesting from plants. Added a consumable system
to work with needs. Added a few consumables for testing. Added some
flora, and made them grow food if they are capable of doing so. Made
a slightly prettier debugging map so I don't throw it away. Made a few
more sprites.