added database signal loading, system identification is working
amend to last commit
changed some item and database structure
updated flukso logic to new structure and added flukso ip adress as an item attribute
changed the way ventilation is controlled so it fits in the new structure
Merge branch 'dev_parameterestimation' of https://github.com/BrechtBa/knxcontrol into dev_parameterestimation

Conflicts:
	smarthome/logics/system_identification.py