WIP for the CLI tool

This is still a work in progress, but I'm sending it your way so you can review and add suggestions/comments early on.

Most of the features are there, there are a few missing (most notably adding accounts to groups) but most of the features are there. We had to change a couple of the flags from the initial spec because some were not posix compliant and some we causing trouble with the way docopt (out parsing lib) works. By this I mean mostly flags like -cr/--create-directory were changed to (-R/--create-directory). Because -cr would have been seen as -c and -r.

The readme is in place as well (let me know if I missed anything there, or any general feedback on the structure....). 

What's left now is polishing (add the missing add_to_group feature) and adding tests.