Merge pull request #1 from robertchoi8099/master

initial commit
Merge pull request #2 from robertchoi8099/master

modify logstash version to '1.2.1'
Merge pull request #3 from robertchoi8099/master

add splunk attributes and rewind logstash conf template
Merge pull request #4 from robertchoi8099/master

fix chef-rewind attr 'cookbook_name' to 'cookbook'
Merge pull request #5 from robertchoi8099/master

fix wrong attribute namespace
Merge pull request #6 from robertchoi8099/master

change logstash download url and index retention period
[refactoring] introduce 'per-env' attributes