Add comments on confirm/refute connection

Users can now add a comment such as "The account got hacked and is no
longer related." when confirming or refuting a linked connection.
Add commenting for new links

This will allow users to comment on the initial connection linking as
well as confirmations/refutations.
Remove random line break
Add backend for commented connections

This commit finishes the backend handling of saveconnection and
refuteconnection with an attached descriptive message using the
savepacketfromdata RPC call.
Merge branch 'master' of github.com:thofmann/identifi-rails into thofmann-master
fix layout & js
Merge branch 'thofmann-master'