[#44064519] Restore old code, tests, and script for story-push
[Delivers #44064519] Restore old code, tests, and script for story-push
[Finishes #44108641] Put parse method in Command class
[#44109825] Put common tests in command_spec
[#44109825] Add basic story_pull
[#44109825] Finish basic story-pull
[#44109825] Change from current_branch to story_branch
[#44109825] Add git-story-pull script
[Finishes #44109825] Add documentation for story-pull
[Finishes #44109843] Add git story-merge
Merge branch '44109843-story-merge'
[#44112911] Add working story-open command
Merge branch '44112911-story-open'