Version 1.3.0: Various changes

* Check for version file being readable
* Better regex for detecting version number
* Warning if you're not on master
* Fail unless there's a tracking branch
* Ensure you're uptodate with origin
* Tag the version as well
* Slack notifications
Create annoted tag.  Closes #4
Version 1.4.0: Annotate git tags

* Annotate git tags
Cleanup after thyself
Version 1.4.1: Cleanup after release

* Cleanup gem after release
switch to rm for testing
Version 1.4.2: Cleanup bug fix

* Change way stuff is cleaned up
Yikes - remove }
Version 1.4.3: Bugfix remove dodgy char

* Bugfix