TGD Users now replaces OA Panopoly Users
Added some basic tokens, more devel dependencies.
Implemented 'Create new file' and 'Synchronize files'. Added some theming
Moved file list to Sync form. Added TgdDriveService class to avoid sending emails.
Added admin view for command buttons. Removed obsoleted features_overrides file.
Features update: Added command button for tgd drive, removed Google Drive button.