Update README.rst

plaintext/raw is now the default codec for logstash... updated to reflect this with the TCP transport example
Merge pull request #191 from LambdaDriver/master

Update README.rst
Support for multi-line events.
Support for multi-line events in tail-version.
Support for multi-line and tail_lines options.
Moved multiline_merge function to utils.py.
Update beaver to support logstash version 1.2 format
Fix version lookup
Merge pull request #193 from PierreF/multiline

Support for multi-line events.
Merge pull request #194 from josegonzalez/logstash-format

Logstash format
Add config option to manipulate ssh_options

This option allows to pass all ssh options to the tunnel.
Handle publication failures in the TCP transport correctly
Merge pull request #195 from moniker-dns/feature/tcp-transport

Handle publication failures in the TCP transport correctly
Set transport as valid on connect (properly resets for reconnect)
Merge pull request #197 from chrisroberts/bugfix/rabbitmq-revalid

Set transport as valid on connect (properly resets for reconnect)
Don't crash on a string decoding exception
Merge pull request #201 from atwardowski/master

Don't crash on a string decoding exception
Make consumer check threaded to prevent wedge state
Merge pull request #198 from chrisroberts/enhancement/no-wedgies

Make consumer check threaded to prevent wedge state
Convert producer to process. Allow timed producer culling.