 
       Usage: apm list
              apm list --themes
+             apm list --packages
              apm list --installed
              apm list --installed --bare > my-packages.txt
              apm list --json

      manifest.name = child
      if options.argv.themes
        packages.push(manifest) if manifest.theme
      else
        packages.push(manifest)


    options.alias('i', 'installed').boolean('installed').describe('installed', 'Only list installed packages/themes')
    options.alias('j', 'json').boolean('json').describe('json',  'Output all packages as a JSON object')
    options.alias('t', 'themes').boolean('themes').describe('themes', 'Only list themes')
    options.alias('p', 'packages').boolean('packages').describe('packages', 'Only list packages')

  isPackageDisabled: (name) ->
    @disabledPackages.indexOf(name) isnt -1
