Added a check to make sure stdlib.rake is present
Add check for versions and change pattern for ruby_version
Modified default ruboto.yml (default to 1.9, remove some stdlib components by default, comments)
Added rake task for checking dependencies; Updated code for removing portions of stdlib including an 'auto' option
Added stdlib_dependencies.rb to manage the building of stdlib.yml
Added generated stdlib.yml; regenerate using rake libs:generate_stdlib_dependencies
Added rake libs:generate_stdlib_dependencies for regenerating stdlib.yml