Update to handle the 2013 flight frame format
General update of the website to handle 2013 flight frame format

- Addition of the calibration variables to calibrate the data in the json[filtered] array
- Addition of the rawFullScreen link in the index page
- Update of the donneesFullScreen page to handle 2013 flight data
- Update of the common.js data processing function to handle 2013 flight data
- Addition of variables and comments in common.js to ease the website adaptability
- Addition of realDate function in common.js to get GPS time format date from a date epoc
- Addition of events.test to test the 2013 flight data format