Add support for named/un-named regexp capture groups in the matcher
Merge branch 'dev' into features/message_matcher

Conflicts:
	pipeline/filters.go
Add capture support to the matcher

- Added a second input channel to the FORunners to receive the PipelinePack and the Matcher
capture results
- replaced message_manipulation.go functionality with message_matcher
- updated the sandbox timer_event API to pass the time in (since the Lua clock is low resolution)
- updated the sandbox_filter to use the MGI for message injection, output is still TBD
Merge pull request #49 from mozilla-services/features/message_matcher

Features/message matcher