Don't bother with the ten minute rule for Keychains

It's remarkably annoying since it applies to the whole keychain and not
just to the SSH agent.
More new SSH rules
Install Graphviz
Install Dropbox
Upgrade to Papers 3
Only launch the App Store if necessary
Hold off on overbearing security settings for now

This causes the keychain to lock every time the machine's closed but
that is really annoying.  I'm going to regroup to find a way to only
expire SSH keys and not the entire keychain.