Remove explicit ranch dependency

Mix now handles rebar dependencies' dependencies
super calls are now explicit
Fix path for layout in layout guide.
Merge pull request #82 from jdrexler/master

Fixed layout path in layout guide
Merge pull request #73 from ericmj/remove-ranch-dep

Remove explicit ranch dependency
Update to Elixir master
Avoid warnings on master
added a reminder to scale up the web processes to 1 to actually boot the dyno
Merge pull request #85 from cbd/patch-1

added a reminder to scale up the web processes to 1 to actually boot the...