Cleaned up INFO system some more, added API to select categories, modified the printo...

Cleaned up INFO system some more, added API to select categories, modified the printout function to print cleanly for...

Original commit message from CVS:
Cleaned up INFO system some more, added API to select categories, modified
the printout function to print cleanly for GST_INIT info (the default min)
and spew function:line debug_string [element] for everything else.
Eventually could make even that configurable easily enough, just check
against another bitmap instead of checking for == GST_INIT.