Add a bool flag with options
Add a means to see if a flag has been used
Try and add a synopsis line to generated man pages
Convert ola_e131 to our flags module
Allow en/disabled? as flexible bool options
Merge pull request #449 from peternewman/e1.37-2

Change the flags so the negated ones are --no-, this mostly affects --no...
Merge branch 'master' of https://github.com/OpenLightingProject/ola into e1.37-2