Add nokogiri gem for dev
Add spec_helper

* Require spec_helper in all specs
Add text_in spec helper

* Use text_in for Hyperloop::Application specs
Use text_in in Hyperloop::View specs
Add spec for application with a layout
Get yield working in layouts
Add spec for subdirectory view with layout
Add view spec for layouts
Tweak Application#initialize a little

* Move some lines around
* paths -> view_paths
Merge pull request #3 from jakeboxer/layouts

Add layouts