Add Blogger (blogspot.com) importer

I created a Blogger-to-Jekyll importer.

    $ jekyll import blogger --source /path/to/blog-MM-DD-YYYY.xml


Would you capture my importer?
Removing the line cause an error on `include REXML::StreamListener` on `BloggerAtomStreamListener` class.

I have no idea how to do same without `require`...