Add multiplier to moster group entries.
Extract new multiplier property from monster group entries.
Scale monster spawns based on monster group entry multiplier property.
Changed artifact saving to use json, to allow easy storage of the arbitrary
strings that can appear in names/descriptions.

Closes #357
Remove old artifact loading code
Make loading tool artifacts work
Make loading artifact armors work

Closes #860
Fix typo in comments
Fix tabbed indentation
Update changelog
Simple building check that prevents roads from going through buildings...
Metion of building additions and support for 2x2 and 3x3 fixed buildings...
rewrote pit iexamine to allow for planks on map tile to be used
Similar change for spiked pits
Add query_any

This speeds up reading computer text significantly
Cleaning Up Computer Messages

Computer interface is more fluid and will redirect you to a clean menu rather than having remnants of the last action.
HWS e-mails part II

These were too long to add initially so I held off till I had a bit better handle of computer.ccp
E-mails for HWS
HWS 2nd computer activated
Dropped security for individual e-mails, too much hassel.