Removing test/ directory. This will live in the TFrame project.

Also changing a duplicate naming of a mask utility.
Adding init functionality for each of the current layers.

The init function works its way down the layers, returning if it
gets a failure.
Renaming BgeMapIcmpUseMask => BgeMapIcmpUse. It is better for this to be an opague data type.
25. learn POSIX thread API
26. create thread pool data structure
Updated planning for sess thread management.
Moving sess thread management over to new SessSession idea.
Added beginning of SESS.dispatch.start.
Moving around a few status codes.
Thread successfully created! A little more bookkeeping and them we are
done with task 27.