Added AWS CloudWatch output plugin - LOGSTASH-461
Removed unused imports
Merge branch 'master' of https://github.com/logstash/logstash
Added documentation comments - LOGSTASH-461
Merge branch 'master' of git://github.com/logstash/logstash
Updated cloudwatch output documentation comments
Merge remote-tracking branch 'remotes/logstash/master'
Merge remote-tracking branch 'remotes/logstash/master'
Merge remote-tracking branch 'remotes/logstash/master'
Merge branch 'master' into cloudwatch-docs
Added support for all Nagios statuses in output

Previously the nagios output only supported issuing:

* WARNING, or
* CRITICAL

for check results.

This commit adds support a config option, nagios_level, which
defaults to CRITICAL and can be overriden by the "nagios_level"
field in an event.
Updated with feedback from Jordan
Merge remote-tracking branch 'remotes/logstash/master'
Merge branch 'master' into cloudwatch-docs
Updated cloudwatch output documentation comments
Added list of cloudwatch region's
Merge pull request #298 from jamtur01/nagioslevel

Added support for all Nagios statuses in output
Merge pull request #299 from semiosis/cloudwatch-docs

Cloudwatch docs