Try and make mixpanel stream things via incredible monkey patching
powers.
More importer improvements:
 * BUGFIX: Don't delete the events CSV if the user says not to
 * FEATURE: Add ability to skip N events
 * FEATURE: If the CSV file is present, assume the user wants to read
   from it.
Merge pull request #3 from keenlabs/skip-and-reuse

More importer improvements (PR #3 from @gphat)
Merge pull request #5 from keenlabs/more-importer-improvements

merge pull: importer improvements