Add 'clear_cache' method
Merge pull request #12 from ianejames/clear_cache

Add 'clear_cache' method (Fixes #11)
Remove dependency on ActiveSupport::OrderedHash
Test with 4.0 and 3.2

* Update README with new requirements/methods (clear_cache)
Experimenting with .travis.yml

* just use a single line gem file decl
Convert tabs to spaces ***
Ok, just a single gem file per ruby