Add entry_point for 'missing' scripts

[kwinkunks]

The script maintainer.py implements an argparse CLI but has no entry point and can therefore only be run by passing it to the interpreter. Essentially, komodo doesn't 'know' about it.

There may be other scripts like this one, but this is the only one I noticed so far.

[berland]

It probably also means that the script is not in use at all, and can also be deleted..

[kwinkunks]

True.

If we like the functionality, it could make sense to have komodo-show take either version or maintainer as a subcommand. So many options...

Either way, if we do want to get rid of it, we should deprecate first.

[kwinkunks]

The script cleanup.py also does not have an entry point. Editing this issue to cover it.

This script also lacks a proper CLI, it just parses sys.argv.