The doc filter should be None if it isn't active.
Underline the module title.
When there are no modifications to sys.path, don't try anything
fancy with imp.find_module.

This is a hack and needs to be fixed properly. I guess imp.find_module
can't do compiled modules. But I need a way of restricting imports.
Python has only one right way to do things, right? LOL.
Merge branch 'master' of github.com:BurntSushi/pdoc
80 cols when possible