Issue #859468: renamed long field names to md5 hash value. added customize/overide converters by custom user modules

Issue #522878: removed critical uninstall issue. user have to delete all files manually if uninstall fileframwork module. message is set when uninstall

 * Added status messages telling that file conversion is pending;
 * Included options to limit simultaneous file conversions;

Changeset:
 * Added padding after the groups selection in the file browser;
 * Ensure that compressed files are not double zipped when mod_deflate is enabled;

 * Altered browser functionality to be more user friendly;
 * Added converters for macro enabled MS Office documents;

Changelog:

 * Added APC based file upload progress meter;
 * Added file delete option in the file browser;
 * Added option to delete file attachments on the parent node deletion;

 * Fixed typo in the browser;
 * Added display options for the file size, type and uri in the views;

 * Fixed double tagging of the files uploaded via file_browser;
 * Changed display of the text preview;

FileFramework: explicitely disabled comment attachments fo anonymous users as this is not yet implemented.

Changelog:

 * Refactored file_browser to speed up navigation;
 * Empty restrictions for file extensions doesn't work, #754094 by mjhammel;
 * OG Browser tab breaks + Gallery tab warning #739750 by jvieille;

Changelog:
 * Changed file_messaging so that the attachments are added to a non digest messages;
 * Chenged file_views display for the file type;
 * Added --exclude option to the drush file convert action;