WIP added version file to build and show it in footer
changed the name of the version file and how it is referenced
update the agent_software record with the version
added a build_release script to build a distribution with a named version
exposed version in backend via /version endpoint
exposed version in public footer
added backend tests for version
fixed 'says hello' backend test to look for the version
Merge pull request #536 from hudmol/show-version-number

Show version number