Hourly data resolution

With this milestone we want to support hourly resoluted data as good as possible. This includes checks, if all methods run properly and if heuristics are required to be adjusted (e.g. persistence forecast).

Unstarted Issues (open and unassigned)

Climatological Skill Scores (hourly resolution)
#158 To Do discussion
Bootstraps (hourly resolution)
#157 To Do refactoring
Persistence forecast (hourly resolution)
#156 To Do enhancement
BUG: empty monthly plot using hourly data
#155 To Do bug

Ongoing Issues (open and assigned)

Completed Issues (closed)