(maint) Adding Eric Timmerman's ssh keys

This commit changes authorized_keys by adding the ssh key of
eric.timmerman@puppetlabs.com. It also adds the file eric.timmerman.pub
to ensure ssh key is there.
(maint) Adding Eric Timmerman's ssh keys

Updating, was copied incorrectly.
Merge pull request #62 from clantant/maint/production/adderic

(maint) Adding Eric Timmerman's ssh keys