Fix coordinate handling when avoiding spawning vehicles on top of each other.
Change MAX_ITEMS_PER_TILE from 64 to 1024
vehicle::add_item limits volume per MAX_VOLUME_IN_VEHICLE_STORAGE (500),
items per MAX_VOLUME_IN_VEHICLE_STORAGE (1024)
Added cabin and update to prison
Added Cabin basement
Added cabin spawn
Added Cult Monsters
Added Cult Monsters
Added etched human skull for martyr mission
Added 'Visions in Solitude' for martyr mission
Added dialogue for Martyr Mission 3 & 4
Added Martyr Mission 3 & 4
Added Martyr Mission 3 & 4
Added Martyr Mission 3 & 4
vehicle: add max_volume, free_volume, stored_volume, and is_full functions
map::add_item_or_charges returns bool, checks maximum volume, handles
spillover if 4th arg is set.
add_item has optional max items argument (still defaults to 64)
add max_volume, free_volume, stored_volume, and is_full functions
advanced_inv: support volume limitations in map tiles and vstorage,
refactor item movement, add safeguards against item loss, support
stupidly large numbers for headers and weight/volume columns.
pickup: support huge item lists in legacy letter-selection via
extended 2 letter sequences for 64th item and beyond ( ie, `gY )
Use 'add_item_or_charges' in drop, drop_in_direction, pickup ("drop
 weapon?" prompt, unload (inventory full), and handle_liquid
Leg Guard Addition

Featuring Hard Leg Guards and Metal Leg guards (Metal Leg Guard recipe
Included)