GitLab

- String topics are now used across all of DCDB, up to Cassandra
- As of now, sensor names ALWAYS match MQTT topics
- Users can still define sensor "aliases" via dcdbconfig that point
to the same topics

Add SensorConfig::loadCache() that loads all published sensors into a list and creates a map for faster lookup of sensor names

Introduced a bit mask for sensor properties in dcdblib and dcdbconfig (e.g., integrable, monotonic,...)

Still pending: honor scaling_factor during query().

of the new super-simple C API in DCDBLib.

* Extended DCDBConfig and SensorDataStore to provide functions for querying data
* Adapted dcdbquery accordingly
* Project now compiles again but dcdbquery likely to be broken

* Added SensorConfig and DCDBPublicSensor classes as interface for dcdbconfig
* Fixed bugs and tested:
  --> CollectAgent fully working
  --> dcdbconfig fully working