I the following updates and merged to develop:
- Expanded the "how to write a rule" docs, with a new section on rules that use ESS data.
- Improved the FilteredTopicWrapper docs to explain that it's probably not directly useful for rules (use FilteredFieldWrapper and its ilk, instead).
- Improved the BaseFilteredFieldWrapper docs.
- Tweaked where FilteredTopicWrapper are added to the registry: now it's done in the FilteredTopicWrapper constructor (which was already testing for existence and raising if found), rather than in Model.make_filtered_topic_wrapper. This eliminates the ability to create an unregistered filtered topic wrapper (which in turn required small change to a unit test).
I will not release a new version until I have a humidity rule, at least. There are several outstanding tickets for new rules, but humidity seems directly relevant because it makes a much better example of a rule that uses ESS data.