Use /var/cache instead of /var/run as default folder for LogfileInput seek journals and
WhisperOutput db files, since /var/run is usually deleted on machine reboots.
Merge branch 'dev' into features/no-var-run

Conflicts:
	pipeline/filemonitor_test.go
	pipeline/logfile_input.go
	pipeline/whisper.go
Formatting tweaks and use Logstash schema version number instead of prose name
(i.e. `logstash_v0` instead of `logstash_original`).
Upgrade docs to match code tweaks.
Merge pull request #353 from mozilla-services/features/no-var-run

Use /var/cache instead of /var/run as default folder for LogfileInput se...
Merge pull request #368 from mozilla-services/features/kibana-tweaks

Tweaks to the Kibana formatter that was added to our ElasticSearch output.
Issue #351 Truncate the seek journal
Merge pull request #371 from mozilla-services/issue_351

Issue #351 Truncate the seek journal
No longer require that stats be prefixed w/ the 'stats' namespace.
Merge pull request #374 from mozilla-services/features/no-stat-prefix

No longer require that stats be prefixed w/ the 'stats' namespace.
Issue #344 LogfileDirectoryManagerInput
Bump whisper-go revision and adjust to slight API changes.
Merge branch 'dev' into features/whisper-go-rev-bump
Merge pull request #377 from mozilla-services/features/whisper-go-rev-bump

Features/whisper go rev bump
Merge pull request #376 from mozilla-services/issue_344

Issue #344 LogfileDirectoryManagerInput
Merge branch 'dev' into features/no-recover

Conflicts:
	pipeline/pipeline_runner.go