tweaking this and cleaning command line help

still working on this. not going to merge yet. 

new help language: 

````
Usage:

The starting worflow is to begin your work. Use the subcommand "init" as in:

zit init -c CONNECTOR [params]

The finishing workflow, for when you are ready to create a pull request uses the "finish" subcommand, as in:

zit finish -c CONNECTOR

The params for init are as follows:

    -c, --connector NAME             The connector. Either "zendesk" or "jira".

If working with Jira, the following are required params:
    -p, --project PROJECT            The Jira project code.
    -i, --issue ISSUE                The Jira issue number.

If working with Zendesk, the following are required params:
    -t, --ticket TICKETID            The ticket id of the Zendesk ticket.

    -h, --help                       This help dialog
````

Changed the ready subcommand to "finish" since that makes more sense. Needs more testing before merge.