REES release 1.6.0

Feature: BillE - lama groups

Feature: BillE - lama groups

Feature: REES - export amount projects/chargepoints/...

Feature: MieA - connect HEMS hardware, meter overview, AES on flats

Feature: MieA - tarif in project show

Feature: MieA - advanced view

Feature: MieA - todos to help workflow

Feature: REES - projectcontract

Feature: MieA - fullabo, partabo

Feature: MieA - delete measurement in projectview