Restored the "fill all the holes" strategy to the ZeroFill class, and introduced the fill_style option ("minimal" and
"all" are possible values). Also allowed a set of required times to be specified when asking the times series for it's
data. This way, we can ensure in the stacked bar chart that each data point in use has a value preventing the bars
from stacking incorrectly.
cleaned up the documentation a bit
fixed a property typo
added check for 404 response from the index_save call, assumes that auto_create_index is disabled and attempts to create the index before saving a second time
Merge remote-tracking branch 'spencer/auto-create-index' into spencer-404
Merge remote-tracking branch 'spencer/zero-filled-ts' into zero
Merge branch 'zero'