add papertrail cookbook

Author: marques-work

Berksfile

@@ -14,3 +14,4 @@ cookbook 'yum', git: 'git://github.com/opscode-cookbooks/yum.git', tag: 'v3.4.0'
 cookbook 'yum-epel', '>= 0.3.4', git: 'git://github.com/opscode-cookbooks/yum-epel.git', tag: 'v0.5.1'
 cookbook 'elasticsearch', git: 'git://github.com/elasticsearch/cookbook-elasticsearch.git', tag: '0.3.11'
 cookbook 'mongodb', git: 'git://github.com/edelight/chef-mongodb'
+cookbook 'papertrail', git: 'git://github.com/librato/papertrail-cookbook', tag: '0.0.7'