Improve script to setup labels
Improve script to setup labels

Address @gvwilson comments:

- add an example
- variables in the shell are UPPER_CASED
- Check that repository exists using a HEAD

easyreporting/fmri_reporting,easyreporting/fmri_reporting,easyreporting/fmri_reporting,RobIsaTeam/courses,RobIsaTeam/courses,easyreporting/fmri_reporting,easyreporting/fmri_reporting,easyreporting/fmri_reporting