ipython/ipython — pull request #4125 by minrk (2013-08-28 18:26:06+00:00)
Title: Basic exercise of `ipython [subcommand] -h` and help-all

for various subcommands.

Prompted by the fact that `ip qtconsole -h` and `ip nbconvert -h` are both broken in master.
This PR also fixes both.