bump dependency on sensu cookbook to ~> 0.6.0
remove redis cookbook from berksfile

sensu cookbook now depends on redisio cookbook, available on community
site
remove rabbitmq constraint from metadata
bump sensu constraint slightly
update rabbitmq_user resource for new rabbitmq cookbook version
bump to 1.2.0
update check-rabbitmq-messages.rb to handle queue descriptions without a message count
bump to 1.2.1
Adding --authreqok flag to check-http plugin

When using this flag HTTP 401 responses are considered OK
adding fretnot monitoring recipe
bump to 1.2.2
fix invalid --redirectok option for fretnot_appserver_http_80 check
bump to 1.2.3
add newer mongodb-metrics plugin for mongodb 2.4 hosts (catalog)
bump to 1.2.4