Remove some old commands
initial support for uploading to pvoutput.org
batch status uploading
tidy, tidy, tidy
Merge remote-tracking branch 'pbarker/pvoutput'
PEP8 cleanups
Assorted idiomatic cleanups to pvoutput code

This makes various cleanups to make the pvoutput code match modern Python
idioms.  Changes include:
  * Using True/False instead of 0/1 for boolean values
  * Using list comprehensions instead of map
  * Using string methods instead of the string module
  * Removing some redundant imports
  * Using explicit sys.exit() instead of builtin exit()
  * No extra parens around if conditions
  * Use Python truth-value conventions instead of explicit len() checks
  * Fix some non-standard indent levels