0.3.0

Potential breaking change: BB.js now successfully provides datetimes instead of just dates more often. Which means higher data integrity / better parsing! But the JSON format for our datetimes (YYYY-MM-DDThh:mm:ssZ) differs from the format for our dates (MM/DD/YYYY)**, so programs upstream of BB.js might break, if they were depending on receiving a string in the latter format.

** See #123 for the discussion about why we use the latter for pure dates