sprues: now with trim and trim_radius!!

Fixes #235

samples/sprues/_advanced_sprues.rb

@@ -0,0 +1,33 @@
+require 'squib'
+
+# This is a more advanced example of Sprues
+# (mostly so we can have a torturous regression test)
+#  - Uses a custom sprue
+#  - Weird rotations
+#  - Center-positioned
+#  - Uses per-card trim and trim_radius
+#  - Multiple pages
+Squib::Deck.new(cards: 6, width: '2.2in', height: '2.1in') do
+  background color: :blue #blue never shows up! Yay clipping...
+  rect stroke_width: 5, stroke_color: :red, fill_color: :salmon
+  cut_zone margin: '0.125in',
+           stroke_width: 2, stroke_color: :purple
+
+  circle x: width/2, y: height/2, radius: 20 # midpoint
+
+  text str: (0..9).map{ |i| "Card #{i}\n\n" },
+       font: 'Sans 32', align: :center, valign: :middle,
+       height: :deck, width: :deck
+
+  # Per-card trims just for funsies
+  trims = ['0.2in'] * 9
+  trims[0] = '0.3in'
+  trims[3] = '0.4in'
+  trim_radii = ['10pt'] * 9
+  trim_radii[1] = '0.2in'
+  trim_radii[3] = '0.75in'
+  
+  save_sheet sprue: 'my_sprues/weird_sprue.yml',
+             trim: trims, trim_radius: trim_radii,
+             prefix: "advanced_sprues_"
+end

samples/sprues/my_sprues/weird_sprue.yml

@@ -0,0 +1,17 @@
+---
+sheet_width: 5in
+sheet_height: 4.5in
+card_width: 2in
+card_height: 2in
+position_reference: :center
+cards:
+- x: 1.1in
+  y: 1.1in
+- x: 3.1in
+  y: 1.1in
+  rotate: 3.14159
+- x: 1.1in
+  y: 3.1in
+- x: 3.1in
+  y: 3.1in
+  rotate: 2 # 2 radians?? ew.