Monthly adjust

This is an experimental version of a web interface for editing/changing the sprinkler software configuration.

I have not yet be bold enough for testing it on my production controller. I did check the saved config item by item, but the problem is to have a reference configuration that is complete, i.e. that has all possible elements (which is one reason for editing the config-template.json file: attempt to put each possible element at least once).

I am looking for someone to review this and help test..

Full disclosure: the code in public/config.html is kind of ugly. This is my first javascript / html form. I am looking forward for advises.