actions 1.0.0-beta instructions

- update requirement to EC 11.1.8
- update standalone instructions on how to configure rabbitmq on EC

- add special workaround for EC 11.1.8 and missing webui_priv.pem
Merge pull request #288 from opscode/jc/actions-1.0.0-beta.1-updates

actions 1.0.0-beta instructions