Add a version template file
Fix version template
Add shelljs node package
Add grunt task `version`

Used to write a `version.js` file inside of `app/js/arethusa/`.
Minor renaming in version template
Start with a versioner service
Extract a helpPanelHeading directive
Add the repo to the version CONSTANT
Refactor and update versioner
Add versioner output to the help panel
Upadte en and de translation files
Fix translations in helpPanel template
Fix naming of helpPanel directive file
Extract helpPanelItem directive
Merge pull request #461 from latin-language-toolkit/versioning

Add git versioning to Arethusa