Added few packages that seem to be required by few IPv6 tools
Added few TODOs
Added libyaml

Ruby complained:

/usr/lib64/ruby/1.9.1/yaml.rb:84:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your
ruby.
Added genpower to the list of essential pkgs