Remove all gratuitous `recover()` calls; resolves #323.
Remove unused imports and a little bit more of the panic detritus.
No longer require that stats be prefixed w/ the 'stats' namespace.
Initial support for existence of a `base_dir` global config option, defaulting to
`/var/cache/hekad`.
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
Remove `configPlugin` functions that don't really serve any purpose now that the
contained `defer` calls have been removed.
Merge branch 'dev' into features/heka-root-folder
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
Merge pull request #369 from mozilla-services/features/no-recover

Remove all gratuitous `recover()` calls; resolves #323.
Merge branch 'dev' into features/heka-root-folder

Conflicts:
	pipeline/config.go
Merge pull request #374 from mozilla-services/features/no-stat-prefix

No longer require that stats be prefixed w/ the 'stats' namespace.
Significant changes to seek journal configuration behavior for LogfileInput and
LogfileDirectoryManagerInput, w/ corresponding changes to documentation and
tests.
Tweaks to whisper output code and docs to support output dir relative to the Heka
base dir.
Update DashboardOutput code and docs to make use of Heka base dir.
Fix sandbox compiler warnings when using -Wall