Update master branch to use Spree v3.0.0.beta
Update docs to reflect current branch and repo.
Update spec support for RSpec 3.1.x
Build version with Gem::Version.new and bump.
Add support config for Hound CI.
Minor engine tweaks.
Say goodbye to hash rockets.
Move admin navbar link for pages.

It does not belongs in Configuration so let give it its own tab similar
to Users without sub menus. Also add cancan support for menu link.
Rework admin layout for master branch.
Rework frontend layout for master branch.
Green specs and syntax fixes.
Fixes spec filename typo.
Refactor old syntax and common cop offenses.
Lower timeout for feature specs.
Make foreign link nofollow
Make header, footer and sidebar links nofollow