Adding note about outputs/elasticsearch/index requiring lowercase letters

ElasticSearch will refuse to create (without an error) any indexes that contain uppercase letters. Lowercase letters, numbers, and punctuation are permitted.
Fixed region_endpoint bad check
Update docs to point to the new, elasticsearch-hosted download
Update logstash.sysv.redhat

Move daemon startup to be much later to allow for network file-systems to be mounted before we start.
- remove some unused stuff
adding sumnumbers filter
inputs: pipe: rerun command when it terminates

This change causes the pipe input to keep rerunning the command.
Without this change, if the command crashes or simply stops sending
output for some unknown reason, then logging effectively stops.  Also,
it introduces a short delay before restarting the command to avoid
churning on a failing command.
digest/sha2 was required for sqs to connect successfully
- raise an exception if you try to set @timestamp to an invalid value
type. OH STATIC TYPING SOMETIMES I MISS YOU.
Add i18n filter with trasliterate support
[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
[oldlogstashjson] fix broken test logic in 25dc988
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
[rabbitmq] Bunny 1.0.5+
Fix for LOGSTASH-1634