Add Beaver Input/Output Examples to the README

I spent too much time getting the data structure right for the beaver inputs... so added examples to make it easier on everyone else :)
Initial support for logstash 1.2.x

* default logstash version 1.2.2
* attributes to specify: config_dir, home, config_file for both agent and server.
initial support for conditionals in config file
added support for describing conditionals in the plugins attribute hashes
toggle data driven templates, allow regular chef templates
Add simple Kibana web server to server recipe