Issue #31 highlighted a couple of problems with the %whos command. I've fixed the info it gives on lists/dicts/tuples, and removed Numeric from the comments. For now, I've left the code in that handles Numeric arrays: I don't know if anyone actually still uses it, or if it's even possible to use it - I can't find a version of Numeric to download.
Fixes and updates to %whos command.
Turns out I actually have numeric installed from the repositories for some reason. It's still possible to use it, which means someone will, so the code to handle it may as well stay for now, but I don't think it needs a mention in the docstring. So this pull request should be OK for review.
Looks good to me.
merge away, thanks!