updates to lab logo
Gemfile updates: move chef to top-level

1. Install chef 11.6.2 so it is available for server
updates

2. Update rvm-capistrano
add config/lab-littlechef submodule

updates: AwsLabServer, thor could tasks, config.yml

1. config.yml now includes attributes to generate
config/lab-littlechef/data_bags

2. AwsLabServer#create now re-uses ipaddress assigned
to hostname

3. AwsLabServer#setup_data_bags