Add librato-metrics dependency for libratoservice output.
Rename GraphiteServiceOutput to GraphiteAPIOutput.
Pep8 tidy.
Add Librato API output
Add Librato API output
Fix copy/paste typo.
Fix config syntax error typo.
Fix mismatched var name typo.
Fix missing _ typo.
Rename GraphiteServiceOutput to GraphiteAPIOutput.
Handle output exceptions.
Removed unused logging import.
Add libratoapi unit tests.