Make this repo public and publicise it

[AnthonySteele]

As in, actual open source.

[tomhaigh]

If/when we publicise it can we consider how. for example I don't think it would be good to say "this is a great way to create cloudwatch alarms". We might talk instead about this not necesarilly being the ideal way to create alarms, but it filling a useful gap for things like:

• alarms which need to be dynamic
• alarms we want to create over a ton of existing infrastructure
• alarms we want to have automatically added by convention

etc etc