Description:
    The language_extension generator creates stubs for a new Radiant translation.

    The generator takes an language abbreviation as its argument.  The extension name may be
    given as a language abbreviation 'en' or a localized abbreviation 'en-GB' and should not 
    be prefixed with 'i18n' or suffixed with 'Extension'.

    The generator creates an extension directory in vendor/extensions that includes
    i18n_<extension_name>_extension.rb, README and Rakefile files as well as lib, task,
    and test directories.

Example:
    ./script/generate language_extension fr 

    This will create:
    vendor/extensions/i18n_fr/config/locales/fr.yml
    vendor/extensions/i18n_fr/lib/tasks
    vendor/extensions/i18n_fr/README
    vendor/extensions/i18n_fr/i18n_fr_extension.rb
    vendor/extensions/i18n_fr/lib/tasks/i18n_fr_extension_tasks.rake
    vendor/extensions/i18n_fr/spec/controllers
    vendor/extensions/i18n_fr/spec/models
    vendor/extensions/i18n_fr/spec/views
    vendor/extensions/i18n_fr/spec/helpers
    vendor/extensions/i18n_fr/Rakefile
    vendor/extensions/i18n_fr/spec/spec_helper.rb
    vendor/extensions/i18n_fr/spec/spec.opts
