Changes for arbitrary environment names

- changed project to -miker for now, just temporary though
- provide an :allow-any-environment flag under the beanstalk config

The allow any flag means the plugin will accept whatever the user gives
on the command line for "lein beanstalk deploy xxx". If set we just tack
a "-staging" onto the name to make the cname, and let the command go
through.

We're planning to use this to drive some continuous delivery pipelines,
so we want the test scripts to be able to just spin up a developers
functional test environment without also having to go in and put
configuration in place for it.