Landing pages

@NirDremer what's missing now is:

1. TOS and Privacy - content for the currently empty pages.
2. Three graphics and a Learn More section
3. More landing pages variations

1 is a showstopper - all the rest are nice to have (let's add them over time). 

Also - how about adding the same mailchimp box to the index page? 


Note: the page variations will be called a.html b.html etc. Optimizely doesn't work on our site :(