slight api change: the getkey and free functions now take a user data
parameter (which is an aditional parameter to Hash_New.
cmd.c, cvar.c, quakefs.c:
clean up the resulting errors.
pr_edict.c:
use hash tables for lookups of function, global and field definitions.
should speed things up a bit, ESPECIALLY when type checking is enabled.
defaults in non-win32 targets. BASEDIR/SKINBASE are gone and the Cvars
which use them in the code are just given the oldstyle defaults now. Use
of "base" is gone. It was a half-assed solution to a problem that doesn't
exist yet. When it finally does exist, we'll fix it right.
