Iniital commit of keen output plugin stub for testing local Heka
Adds Init for KeenOutput
Updates keen-output plugin to actually send data to Keen IO
Adds error handling/logging for keen-output plugin
Improves error handling for keen-output plugin (logs instead of dying when data field is missing and continues to next pack after logging
Updates keen-output to read 'KeenIO' message field (instead of 'Data')
Updates keen-output to read raw message payload
Renames keen-output.go -> keen_output.go
Adds tests for KeenIO output plugin
Adds TODO in README for switching KeenOutput to HttpOutput
Makes KeenIO collection to use for KeenOutput plugin configurable rather than hardcoded
Merge pull request #1 from Clever/add-keen-output

Add KeenIO output plugin