#48 Alternate over weeks for inactive day(s) input

[wignoxqs]

Fill inactive day over period of time: give option to alternate over weeks; i.e. for given day m in week 1 inactive code on, week 2 not, week 3 inactive code on, week 4 not, week 5 inactive code on, week 6 not, etc.. (start with inactive code on in first given week)