The hotline information has been shortened to

datetime opened,
zip code,
longitude,
latitude,
case#

The datetime now conforms to the formats in existing csv (change
to 2400 and dashes for date rather than slashes).

For now, 'python hotline.py' will open 'Mayor_s_24_Hour_Hotline__
Service_Requests.csv', find cases which had been opened after
2014-03-01, between 10pm-3am, find the missing zipcode, format
the datetime, and write the above columns into 'hotline.csv'

Boston Emergency Medical Response (EMS) data was added. It has 3 years
of incidents from the 5 hour interval Fridays 10pm - Saturdays 3am.

data/EMS.csv, import/EMS.py, import/EMS.csv was added.