Remove SIGUSR1 as its not on Windows.
Merge pull request #177 from mozilla-services/features/plugin-restarting

Features/plugin restarting
Add restarting docs to the man pages.
Issue #152 Wire up Heka alerts to Nagios
Incorporate review feedback for pull request #185
Merge pull request #185 from mozilla-services/issue_152

Issue #152 Wire up Heka alerts to Nagios
Add AMQP input/output docs.
Sandbox filters should be removed when exiting.
Update logfile input docs to note its use of decoders.
Update docs to note change of TransformFilter to LoglineDecoder.
Merge branch 'dev' into features/amqp-plugin

Conflicts:
	pipeline/config.go