Added nil? check for SensuCheck provider. Default values for aggregate / standlone to undef.
Updated unit tests
Make the tests undef to truly test for nil? in provider
Keep original formatting
Undef was a bad idea. ;)
Merge pull request #43 from phobos182/master

Add optional arguments to sensu_check provider. Set sane defaults.
Fixed README
Merge git://github.com/sensu/sensu-puppet