[894] Update Build to Allow Use of Ruby 1.9.3
[894] Update Build to Allow Use of Ruby 1.9.3

* Ruby 1.9.2 is deprecated.
* Ruby 1.9.3 is the newest allowed version on Engine Yard
* Move shoulda gem into test group.

CivicCommons/CivicCommons,CivicCommons/CivicCommons,CivicCommons/CivicCommons,CivicCommons/CivicCommons