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.
Rewrote options screen in help menu to allow for non-boolean option setting.

Conflicts:

	help.cpp
	options.h
Laying groundwork for item disassembly

Conflicts:

	iuse.cpp
	iuse.h
Item disassembly implemented.
Cleaned up item disassembly, which is now also a player activity.

Conflicts:

	crafting.cpp
	pldata.h
Fixed blunder in crafting.cpp
Made duct tape an ammo, removed the redundant bandage recipe and re-merged Kevingranade's stacking code
Initialize shell casings with charges = 1 so they stack with other shell casings properly.
Indentation fix.
Re-enable shell casing scattering.
Cleaned up the list of items for deconstruction
Merge branch 'for-darklingwolf'
Added domestic windows to the pane removal, no curtains yet.
Added bash data for chain fences
Added survival magazine and advanced mechanics textbook
Fixed spawning of new items