Allow incorrect end dates (at midnight of following day) to be adjusted back to previous day
Sort module data where 'period' is present eg. single_timeseries
JSHint & Indentation
Allow deltas to be calculated for percent values.
If period not present, limit result set to 2 items.
If period is present, set duration.
If no format type in Y axis object, assume integer
Merge pull request #26 from alphagov/data-fixes

Data fixes