time and day related evu events (related #38)

[Gifford47]

in my case, the evu is only applicable on monday till friday. but the EVU attributes (especially "time until next evu event") is also count on sunday and saturday. is it possible to add a day related evu state? f.e. a new attribute which "holds" the evu days (monday, tuesday, ...). Is the current day a saturday then "time until next event" counts 2880 minutes for example. related #38