Merge pull request #38 from ketchup/change/6-tab-completion

Add completions.
Merge pull request #34 from ketchup/change/34-add-the-version-command-to-the-readme

Add the version command to the README.
Add basic documentation.
Add the accept command.
Add documentation for accept.
Add completions to accept.
Merge pull request #4 from ketchup/change/4-accept

Command: Accept
Merge pull request #8 from ketchup/change/8-documentation

Documentation
Make checkout skip fetch by default.
Merge branch 'change/31-release-v1.3' into change/36-checkout-skip

Conflicts:
	libexec/change-checkout
Merge pull request #36 from ketchup/change/36-checkout-skip

Make the checkout command skip fetch by default.
Fix a mistake int he checkout documentation.
Bump the version.
Improve the checkout documentation.
Improve the update command's documentation.
Begin adding test suite.
Merge remote-tracking branch 'origin/staging' into staging