Merge pull request #1 from tadodotcom/master

feat(cloudformation-template) extract parameters and update ubuntu's pac...
Make passing of AZs optional
Grant IAM permissions to S3 bucket as well as the buckets therein (thanks @ktheory)
Default to a specific version of official registry image
change auto scaling check type to ELB and use Route 53 Alias record set instead of a CNAME

in addition adds a gitignore file