Add muscle powered as a fuel type.
Add a foot crank as a type of muscle powered power source.
Add a bicycle as a new vehicle type based on muscle power.
Update itypedef.cpp

Make foot crank rarer in preparation for adding it to spawn lists.
Update mapitemsdef.cpp

Added foot crank item to appropriate spawn lists.
Bugfix for containers not being filled when wielded.
Screwdrivers and Wrenches used to disassemble items
Added in lawnmowers, and all they entail
Unfucked skill learning.
Added lawnmowers to spawn lists
Addition of arm armour.

Conflicts:

	README.md
	itype.h
	itypedef.cpp
	mapitemsdef.cpp
Bugfix for cooked food coming out rotten before actual spoilage time

Conflicts:

	crafting.cpp
Fixed bugfix conflict
Fixed crafting of armguards
Fixed up the way curtains work. Slightly broke the construction menu
Fixed colour of curtains item and tile
Added a sawnoff version of the Saiga-12
Cleaned up jackhammering of floors a little, added a leather trenchcoat.
You can now cut up leather items with knives and scissors
Fixed rock floors letting rain in, and digging of rubble and ash
Wolves and bears afraid of fire now