Post v0.5.0 release version bump on dev (i.e. in anticipation of 
eventual v0.6.0 release).
Merge pull request #737 from mozilla-services/versions/0.5

Add support for 'missing' as a match key to support ordering on
Merge branch 'versions/0.5' into dev
Merge pull request #746 from mozilla-services/versions/0.5

 Merge branch 'versions/0.5' into dev
Merge branch 'versions/0.5' into dev
Merge branch 'versions/0.5' into dev

Conflicts:
	CHANGES.txt
Pull in a new lua_sandbox to fix JSON encoding of empty strings
Merge pull request #754 from mozilla-services/sandbox_json_serialization

Pull in a new lua_sandbox to fix JSON encoding of empty strings
Fix the max_hosts check to properly reclaim expired hosts when at capacity
Merge pull request #756 from mozilla-services/cbufd_host_aggregator

Fix the max_hosts check to properly reclaim expired hosts when at capaci...
Add an Apache access log decoder
add BufferedOutput

Extracts the queuing functionality out of TcpOutput.go into a general purpose lib for use in any output module
Merge remote-tracking branch 'upstream/dev' into buffered-output-helper

Conflicts:
	CHANGES.txt
Merge pull request #743 from davidbirdsong/buffered-output-helper

general purpose file buffering for output plugins
Merge branch 'dev' into apache

Conflicts:
	CHANGES.txt
Add Apache decoder test

- duplicates the Nginx test with equivalent log format string
Merge remote-tracking branch 'origin/versions/0.5' into dev

Conflicts:
	CHANGES.txt
Merge branch 'dev' into apache

Conflicts:
	CHANGES.txt
	cmake/externals.cmake
Merge pull request #757 from mozilla-services/apache

Add an Apache access log decoder
Don't barf on an empty or whitespace-only journal file, resolves #755.