BUG: Datetime serialized to SECONDS from Unix epoch rather than MILLISECONDS from Unix epoch #61
Description
When a Python datetime.datetime instance (or Pandas Ttimestamp() is being serialized to a JS literal, it currently gets serialized as seconds from the Unix epoch. This leads to incorrect visualization, since it should be serialized as milliseconds from the Unix epoch. This bug needs to be fixed promptly.
See #60 for an example of this behavior.