refactoring to get middle/center, possibly more

samples/shorthands/_shorthands.rb

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+require_relative '../../lib/squib'
+
+# Lots of DSL methods have shorthands that are accepted for 
+# x, y, width, and height parameters. 
+Squib::Deck.new(width: '0.5in', height: '0.25in') do
+  background color: :white
+
+  text str: 'xymiddle', font: 'Sans Bold 3', hint: :red, 
+       x: 'middle', y: :middle
+       
+  # 'center' also works
+  rect width: 30, height: 30, 
+       x: :center, y: 'center'
+
+  # Layouts apply this too.
+  use_layout file: 'shorthands.yml'
+  rect layout: :example
+
+  # The x and y coordinates can also be "centered", assuming the 
+
+  # HOWEVER! Shorthands don't combine in an "extends" situation, 
+  # e.g. this won't work: 
+  # parent:
+  #   x: middle 
+  # child: 
+  #   extends: parent 
+  #   x: += 0.5in
+
+  save_png prefix: 'shorthand_'
+end

samples/shorthands/shorthands.yml

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+example: 
+  x: 0.15in
+  y: middle
+  stroke_color: blue
+  width: 30
+  height: 30
+