Add Ruby 2.1.0 to Travis config
Update the gemspec to allow RSpec versions > 2.13.x.  Update spec syntax to use 'expect'
Merge pull request #75 from petergoldstein/feature/add_2_1_0

Add Ruby 2.1.0 to Travis config
Merge pull request #76 from petergoldstein/feature/prepare_for_rspec_3

Prepare for RSpec 3.x