* imghdr.py: added jpeg recognition
* torgb.py: added jpeg conversion
* tzparse.py: use functions from time instead of calendar
* whatsound.py: add /ufs/guido/biin/sgi to $PATH when calling 'whatsound'

* calendar.py: remove stuff now built in time; some cleanup and
  generalization in the calendar printing
* cmd.py: use __init__.
* tzparse.py: This module is no longer necessary -- use builtin time instead!

* ftplib.py: support __init__ with optional host, port args
* aifc.py: ensure header is written on close even when no data is written

tuple (now that it makes a difference to Python)

* Fixed calendar.py, mimetools.py, whrandom.py to cope with time.time()
  returning a floating point number.  (And fix old bug in calendar)
* Add recursion level to mainloop.mainloop(), to make it reentrant.

is moved to the sgi subdirectory.

Got rid of old module 'localtime.py'.