Add the ability to space out blank days in admin graphs

[dgets]

The dosage graphing can be a bit misleading, being as there are no entries added for days with no administrations present. Add some code to insert '0 dosage' day entries between them, maybe optionally.

[dgets]

I don't know if it happened when I was working on commit 0de205b, or before, but there is a serious misreporting of statistics going on within the dataview app right now. I'd wager that it's datetime related debauchery, but that's just a guess.