Fix font sizes in the css
Remove PDF file that is not linked from anywhere
Updates for the new SEE-GRID CA 2013

- Added new pdf version of the CP/CPS
- Updated the about page to include information about the new
  SEE-GRID CA trust anchors
- Moved the old information to a separate page
Merge branch 'master' of https://github.com/hellasgrid/see-grid-ca.hellasgrid.gr