serre SVN

Get JSON as query format also, use ArduinoJson to read

Handle simple queries from the app.
Make sure to always return json, also in error messages, from the json handler.

Allow Android app to query a bunch of things in one go, result in JSON format.

Small changes

Initialize new field properly

Don't call realloc on every message.
Keep separate variables for buffer length and message length for that.
Fix bug with clearing previous buffer content.
Reduce logging somewhat.

Close the client on any error, hoping it recovers better.

Move CloudMessaging.cpp into a component structure.

Cloud messaging did work (just need to provide the right credentials and matching phone id).
Lower debug level in the source.
Clean up stuff in switch.cpp, call the messaging API from state changes.

Small refinements, no fix yet.
Added configuration input for required settings.