flag_content 5.x-2.0

- Better description of what the module does now.
- User and node were mistakenly transposed in the admin page. Fixed.
- Removed the option to add nofollow. It is not needed since we now have a confirmation form.
- Fixed admin page for managing flagged items, since it would not return items with the same eid. Now uses fid, which is unique.
#83610 Allow anything to be flagged. Based on Steve McKenzie's patch, with a lot of additions by kbahey.
#99881 Allow anonymous to flag content.
#121811 Add support for storing the flagging user's uid in the table.