Added Google Form email subscription signup

Basically, embeded a  google form into the page. For this example it is used for a newsletter. It's simple: the user adds their name to the table, and when you send a newsletter you copy and paste the entire column of emails. Here is how you can do it with your own table: 
1) create google form
2) click view live form
3) view source codes
4) copy everything inside the form tag and paste it below
5) cut out all the crap
6) make it pretty
7) enjoy!

Please note that jekyll doesn't like me, I don't like it, and prepros doesn't like jekylly sass. So I dont have any stylesheets in the preview page. That is to say I have no idea how this will look. If you can make it look good please do it that would be awesome.

Great series, keep it up!