Fantastic zomes and where to find them

[ThetaSinner]

Following on from the issue report about zome calls yielding unexpected responses I'm opening this discussion about what a zome is, given that integrity and coordinator zomes have different jobs.

The first goal of the discussion is to have clear descriptions and terminology for each type of 'zome'.

The second goal is to decide how we recognise and reference each type in holochain so that we don't end up with confusion and problems for either holochain developers or users. That is to say, we don't want situations where a small bugfix etc in a coordinator zome results in two indestinguishable versions of an application.