add riemann-aws-status, for forwarding aws status events to riemann
Force dates presented by Fog to be strings. Some versions will use the Fog::Time class, others use plain strings.
Merge branch 'master' of git://github.com/aphyr/riemann-tools into aws

Conflicts:
	Rakefile.rb
redis is a required dep
Merge pull request #28 from digital-science/aws

Riemann aws-status