(FACT-342) Add trusty cows

These cows are so trusty, you know they'll just never let you down!

As a side note, this is for Trusty Tahr, also knows as Ubuntu 14.04
Merge pull request #650 from melissaanne/ticket/stable/add-trusty-tahr

(FACT-342) Add trusty cows
Merge branch 'stable' into facter-2