Change tutorial link to Serafeim's blog
Added 'embed finders'. Cleaned up wagtail embeds
Create login_wrapper view

Redirect the user if they are already logged in.
Change login view to the login_wrapper view
Merge pull request #37 from kaedroho/feature/embeds-tweaks

Added 'embed finders'. Cleaned up wagtail embeds
Merge pull request #38 from peterarenot/master

Redirect from login view if user already logged in