- distance is INFINITE, 0, or a positive integer based on get_dist() between
the examiner and examinee's turfs when they are on the same Z. When the
examiner is dead or a ghost, distance is always 0.
- also updates /examine( implementations to use it!
- adds w_class_to_name proc for reusing "It is a X item." examine behavior.
* get_tool_quality has numerical meaning
* Basic tools set tool quality
* Toolspeed is replaced by tool quality checks
* Addresses assorted results from live test
* Extra cleanup
Spookerton