Automatic flechette SMG!
Adds a default ammo type for caseless weapons.
Spawns.
Hull spawns.
Tweak.
Fix the 'enough wheels' calculation to look at wheels hidden under other stuff.
Recipe tweak.
More wheel fixes
Merge remote-tracking branch 'origin/pr/3497'

Conflicts:
	itypedef.cpp
Merge remote-tracking branch 'origin/pr/3498'

Conflicts:
	itypedef.cpp