add an option to handle the authorization process copying and pasting manualy the URL in a browser of user's choice
document the new option
cosmetic
Merge pull request #4 from erral:master: support manual console based auth.

The --noauth_local_webserver option of the Google Oauth script, allows to handle the authorization of the application manually.

If this option is added to the upload and download options when authorization is required, the script will show the URL the user has to visit in order to get the authorization token, later she has the enter manually the authorization key in the command prompt.