Don't actually want an extra label at the end
Fix axes alignment and labels
Show grid lines on y-axis
Add top number on y-axis
Simplified histogram code
Added JavaScript graph.
Try to make javascript data passing work
Remove python graph; javascript graph does the trick
Force start_date to be a date
Ensure there is always a statistics object
Need to update previous period's length when a period is deleted.
Updated boto requirement
Added labels to graph