Added male and female stats to average booking per day
Merge remote-tracking branch 'sc3/master'

Merged in changes from sc3 repo.
Added displaying Charges info and a little code reformatting
Initial refactoring of Averages calculation and display
Second refactoring moved data collected about averages into model
More refactoring, using a more functional style. Fixed defect when only one day is selected.
Added displaying stay duration for longest held prisoner and handling of records with no booking date.
Added percentage reporting to Bail Info and now report longest male and female incarcerated prisoners and refactored the code as well.
Added field, stats_start_date, to CookCountyJailCollection so that we have a defined start date to use for statistical purposes
Added filter function to select prisoners booked on or after Jan 1st, 2013, when collection offically started.
Added computing of Week day booking counts
Refactored so that I am only calculating once how many bookings per day happen
Refactoring changes
Set gen stats data query back to default which is fetch all data.
Got simple d3 graph inserted into page, using fake data
Added graphic display of jail system population
Merge pull request #19 from nwinklareth/master

Added column to Inmates page, added more info to General Stats page, and improved General Stats code