qrush/motion-layout — pull request #4 by seanlilmateus (2013-04-02 13:46:25+00:00)
Title: Use symbols as keys for Metrics and Subviews

Since NSLayoutConstraints doesn't accept symbols as keys for Metrics nor Subviews,
I created this pull request to fix it. it's nothing special only a little rubyfication

``` ruby
Motion::Layout.new do |layout|
layout.view view
layout.subviews state: @state, action: @action
layout.metrics top: 200, margin: 20, height: 40
layout.vertical "|-top-[state(==height)]-margin-[action(==height)]"
layout.horizontal "|-margin-[state]-margin-|"
layout.horizontal "|-margin-[action]-margin-|"
end
```