updated getting_started static page
added Getting Started to nav bar
added deatils/summary tags to #html_clean sanitizing
added link to getting started on landing page Let's code!
added link to Getting started guide to the welcome_email
added migration to import the static_page
adjusted the responsiveness of nav-bar
modified link to use static_page_path
 djusted responsiveness of nav-bar
Merge pull request #470 from YaroSpace/getting_started

Getting started