v2.2 - Statistics page

- Created custom 'myPoliceUK' subclass to extend PoliceUK cURL class
with new functions

- Added statistics page and all required features and functionality

- Added 'Flot' charting plugin for statistics page

- Seperated js and css for statistics page into seperate files

- Added filtering to ensure only required js/css files are included on
pages

- Added configuartion file to hold Google Maps API key and other config
data

- Various styling changes