Free the injected packs to prevent Heka from deadlocking
Recycle all packs with the exception of the original
Merge pull request #566 from mozilla-services/free_injected_packs

Free the injected packs to prevent Heka from deadlocking
Make sure a PluginWrapper sets the plugin name, if specified, when a
plugin is created.
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
Take in array of URLs for HttpInput, Set Logger to HttpInput
Inject timestamp into HttpInput Messages

Important to know for health checks when an endpoint comes back.
Set default severity for successful fetches to 6 (informational)
Merge branch 'dev' into multidecoder-name

Conflicts:
	CHANGES.txt
Merge pull request #572 from mozilla-services/multidecoder-name

PluginWrapper should set plugin name.
Generate internal Heka message for failed HttpInput GETs

Useful for health checks on web apps. Use case is
http://webapp.com/health is unreachable, an message of type
heka.httpdata.fail is generated with severity 1 which can be picked up
by the SmtpOutput.
Allow user defined severity for success/error messages.
Documentation update with changes.
Allow for url or urls options. Set Logger to plugin name.
Documentation to reflect changes
UUID set, meta-data Fields[] populated, Logger set to URL

- UUID set per message.
- Fields[StatusCode], Fields[Status], Fields[Protocol] populated if
HTTP GET is successful.
- Logger set to URL of request.
- Errors with HTTP GET request create minimal error message within
pipeline.
Test update