Rename file and update refs.
Initial text changes
Further changes, mainly fs to dropbox.
Fixes from Petr on rebased PR 422
Remove fs section and dropbox ref.
Fix section underlines to get correct levels.
Correct typo.
Merge pull request #423 from hflynn/agent_fix

Fixes from Petr
Merge pull request #424 from ximenesuk/dropbox-update

Dropbox page update