Remove mongo connection logic

PyMongo's MongoClient uses connection pooling, so there is no need to
open and close the connection each time.
Add script to populate db with dummies

Very minimal for now, but proof is there.

Also, there is no obvious conventional way of doing this as far as I
can tell.
Add search index

Searching for a word in a description of an Event is possible via:

http://localhost:5000/api/events/?q=kw

Where 'kw' is the keyword you want to search for.
Make dummy script generate fake data

This lets us generate more records more easily.
Merge pull request #5 from pennappslabs/ceasar

Add script to populate db with dummies