init checkin of a carbon output plugin
added CarbonOutput to the list of available plugins
added message_matcher syntax to example for CarbonOutput configuration
changed default port from 9125 to 2003 for carbon
updated documentation to refer to the plaintext protocol in Carbon
changed the whisper output to not memcopy payload from the pipelinepack
changed wording on configuration for carbon docs
removed unnecessary if block
Merge pull request #269 from mozilla-services/features/issue_256

Features/issue 256