Remove myfdb crontab if user responds with "no".

If the user inits once with crontab but at a later point doesn't want
it we need to remove the crontab on a "no" response otherwise the
crontab will always be there even if you reinit.
Add puts output so if uploading images manually user gets some status output.
Update authors with current myfdb developers.
Increment version to 0.0.6 to account for some minor changes.
Update docs with new version, proper rdoc formatting and a few edits.