No need for fancy timezone handling, just send a UTC timestamp.  Also,
due to limitations in the JodaTime library that logstash uses it is
limited to millisecond accuracy.  Some versions (1.3.2 in particular)
will choke if given anything other than a millisecond timestamp.
Add 'salt' to the list of tags.
add a formatter for v1 logstash events
update fields for v1
update logstash docs
Merge pull request #9539 from jcollie/logstash-v1

Support for Logstash v1 event schema (and improved timestamp handling)