* Add mysensors state update delay
* Schedule state update after delay to avoid updating state multiple
times during the same short timespan.
* Code review
* Refactor mysensors message handling
* Add handler module and register handlers per message type or message
sub-type. This will allow easier extension of message handling in the
future.
* Move some common functions to a helpers module.
* Add node handler and signal
* Fix inconsistent return
* Upgrade pymysensors to 0.18.0
* Fix bug in message modification.
## Description:
More fixes flagged by pylint 2 that don't hurt to have before the actual pylint 2 upgrade (which I'll submit soon).
## Checklist:
- [ ] The code change is tested and works locally.
- [x] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**
Paulus Schoutsen
Martin Hjelmare
Antoine Meillet
Ville Skyttä