message: embetter the installation instructions
diff: @@ -63,7 +63,26 @@ window.customElements.define(MyElement.is, MyElement);
  ## Usage
  -polymer-modulizer has two modes. Given no default arguments, it converts the current directory as a package. Given one or more GitHub repository names, it creates a workspace and converts those repositories and their dependencies at once.
  +Install polymer-modulizer from npm:
  +
  +```
  +npm install -g polymer-modulizer
  +```
  +
  +`polymer-modulizer` has two modes: package mode, which converts the current directory as a package,
  +or workspace mode, which takes a list of GitHub repositories and creates a workspace out of them
  +(converting the repos and their dependencies at once).
  +
  +### Local (package) mode
  +
  +This converts the current directory as a `bower` package. You _must_ run `bower install` in
  +this directory before running modulizer. The following command will convert the files and
  +add the new ones in the current directory:
  +
  +```sh
  +bower cache clean && bower install
  +modulizer --out .
  +```
  ### Workspace mode
  