add basic keypair task
Merge pull request #1 from patrick-wright/master

add basic keypair task
Merge Patrick's rakefile changes
clean up keygen task
Merge remote-tracking branch 'upstream/master'
Merge pull request #2 from patrick-wright/master

clean up keygen task
Now with key distribution and full provisioning on the backend nodes
Merge branch 'master' into irving/ssh-keydistrib