Explicitly log fatal SandboxDecoder errors so they actually show up in
the output before Heka is shut down.
Merge pull request #573 from mozilla-services/output-fatal-errors

Explicitly log fatal SandboxDecoder errors so they actually show up in
README:  build.sh not install.sh

Afaict it's `build.sh`
Merge pull request #574 from gregglind/patch-1

README:  build.sh not install.sh
Merge branch 'dev' into multidecoder-name

Conflicts:
	CHANGES.txt