Use Controller::check_cache() instead of K2 expires helper in FileProxy and Rest for image delivery.
Add back Session::abort_save() functionality as extension in Gallery_Session.
Add back preference of SERVER_NAME over HTTP_HOST.
Merge pull request #257 from shadlaws/server_name_http_host

Add back preference of SERVER_NAME over HTTP_HOST.
Merge pull request #256 from shadlaws/expires_replacement

Use Controller::check_cache() instead of K2 expires helper in FileProxy and Rest for image delivery.
Merge pull request #255 from shadlaws/session_abort_save

Add back Session::abort_save() functionality as extension in Gallery_Session