Created a new DataSet class to handle connecting and writing to the data base.
Created a new DataSet class to handle connecting and writing to the data base.

With this change, I now store the arrays of data for each run in pytables
arrays. This saves much space because I am no longer padding short runs, but
removes the potential ease of queries offered by the table storage. I've also
added new columns to the run table to identifiy corrupt runs and potentially
corrupt disturbances within a run.

moorepants/BicycleDataProcessor,moorepants/BicycleDataProcessor