Updates bootstrap sass gemfile from shehryar's repo
Removes headings, moves form to centre of page, makes buttons span width of form
Changes routes so that root path is different for authenticated and non-authenticated users
adds an or divider to seperate google and normal sign in
Adds a home controller and views for home page. Alters routes to root to the home page
Adds content to homepage and links to sign in page, modifies nav bar so create event link is always visible and log in and sign up link switches depending on page
Merge branch 'master' into stef