- fomatting for PSR-2
  - add phpcs to tests as part of build
  - rename doxygen file for Eclox to pick it up
  - shorten file header and add CONTRIBUTORS.md file
- re-structure of image handling
  - new optimised implementation for Imagick users
- fix bugs relating to character encoding cache
  - replaced gzdecode() with gzuncompress() for PHP 5.3 support
  - fix to AbstractCapabilityProfile singleton to allow an instance of each capability profile