rake task to associate invited users with organizations
remove debugger and restore step def to previous state
add slash back in
Aligned pipes, updated scenario name, switched to direct shell command

* Practiced using Tabularize from within vim to align my pipes
* Renamed the second scenario to be more descriptive
* Implemented a (slow) step that directly shells out the rake task

All the tests are still passing despite the different way of running the rake task.