add database connection and ability to query all

The DB class gives some basic database connection. 

Extra:
It took about 75% longer then it should have to write because i had to refresh my memory and go over varying options for connecting. For instance, i wanted to use SQLAlchemy but our table currently lacks a primary Key. At this point, as i mention in an issue thread, it might be much easier to ignore this code and the .db file and store our results in a csv and use a dataframe.