Release v0.4.8-beta.0

Bugfix : Formatting of news
Bugfix : delete states in create function
Bugfix : Incorrect initialisation for states
Bugfix : Avoid NULL & 0 values at night reset
Bugfix : Incorrect initialisation for Watt values with 0 input
Bugfix : Only create cumulatedXXX in year statistics if activated
implement category cumulative values under year statistics