Exception fixes

Hi Yuri,

I fixed following exceptions
  * format exceptions for gluttonberg public controllers
  * restricted public controller actions to html format in resource generator
  * public_assets exception fix and query improvement
  * previous_path exception fix for pages
  
Fixes for audio player in backend:
  Provided flash files for audio player and few javascript updates

Added following info to environment variables for gluttonberg pages:
  * GLUTTONBERG.PAGE_INFO
  * GLUTTONBERG.LOCALE_INFO