"git cleanup" command

[kevgo]

Feature: removing old branches from the origin

  As a developer having a bunch of leftover branches in the origin repo
  I want to be able to clean them out using a single command
  So that I keep my repo tidy and manageable.

  - run "git cleanup 'kg-*'" to delete all branches on the remote that are not checked out in the local repository
  - the command prints each branch and gets confirmation before deleting it


  Scenario: cleaning up remote branches
    Given the branches:
      | NAME      | PARENT | LOCATION         |
      | feature_1 | master | remote           |
      | feature_2 | master | local and remote |
    And I am on the "feature_2" branch
    And I have an uncommitted file
    When running "git cleanup" and entering:
      | WHEN I SEE              | THEN I ENTER |
      | delete branch feature_1 | yes          |
    Then my workspace contains the branches:
      | NAME      | PARENT |
      | feature_2 | master |
    And I am still on the "feature_2" branch
    And I still have the uncommitted file

Alternative to #655

[charlierudolph]

Closing as with git ship now merging via the github api, you shouldn't have branches like this left over.