[oldlogstashjson] simplify decoding from v0 to v1
[oldlogstashjson] simplify encoding from v1 to v0
[oldlogstashjson] implement encoding of @fields
[oldlogstashjson] exclude @version from @fields during encode
[oldlogstashjson] append newline to encoded json
Merge pull request #794 from logstash/remove-releases-list

- Remove link to releases that no longer exists.
[oldlogstashjson] fix broken test logic in 25dc988
Merge pull request #744 from dpb587/patch-1

Fix a few typos and make docs a bit more readable.
Adding COMMONAPACHELOG format
Merge pull request #758 from GregMefford/master

Eliminated named literal captures in favor of Grok expressions for ASA firewall patterns
Hash value extraction in order to obey gelf specs (only strings and numbers are allowed in v1.1), see http://graylog2.org/gelf#specs
Fix link to FPM
Error on unknown validator symbol + correct dns timeout validator
[rabbitmq] Bunny 1.0.5+
Merge pull request #800 from wiibaa/validation

Output an error on unknown validation symbol
Fix for LOGSTASH-1634
Typo
Updated gelf output, deprecated fields are now optional, extract values from array
Make the "field" field required for the uuid filter.
Removed superfluous variables.
Improved documentation
Fixed state variables and how they’re populated