API documentation

[tristanlatr]

Hi @bw2,

I've generated ConfigArgParse API docs here: https://tristanlatr.github.io/ConfigArgParse/

It's not 100% complete because it's missing most of the aliases like add(), Parser class, etc (it's a know issue of pydoctor - twisted/pydoctor#313 and twisted/pydoctor#13), but the output it's still useful.

Tell me if you would like me to open a PR with that :)

Thanks