samples: reorganize for better sanity

Converted to a more consistent organization of each folder for groups of samples

Contributes to #118

samples/intro/01_hello.rb

@@ -4,6 +4,5 @@ Squib::Deck.new cards: 1 do
   background color: 'pink'
   rect
   text str: 'Draw two cards.'
-  save_png prefix: 'part1_', dir: '.'
+  save_png prefix: 'part1_'
 end
-

samples/intro/02_options.rb

@@ -10,6 +10,5 @@ Squib::Deck.new cards: 1 do
   svg file: 'robot-golem.svg', x: 75, y: 300, width: 675, height: :scale
   text str: 'Draw two cards', font: 'Serif 36',
        align: :center, width: :deck, color: '#DFDFE1', y: 1000
-  save_png prefix: 'part2_', dir: '.'
+  save_png prefix: 'part2_'
 end
-

samples/intro/03_layout.rb

@@ -7,6 +7,5 @@ Squib::Deck.new cards: 1, layout: 'part3_layout.yml' do
   svg layout: 'drone'
   svg file: 'robot-golem.svg', layout: 'art'
   text str: 'Draw two cards.', layout: 'power'
-  save_png prefix: 'part3_', dir: '.'
+  save_png prefix: 'part3_'
 end
-

samples/intro/04_arrays.rb

@@ -11,6 +11,5 @@ Squib::Deck.new cards: 2, layout: 'part3_layout.yml' do
   text str: ['Draw two cards',
              'Use the power of another player'],
        layout: 'power'
-  save_png prefix: 'part4_', dir: '.'
+  save_png prefix: 'part4_'
 end
-

samples/intro/05_excel.rb

@@ -8,8 +8,7 @@ Squib::Deck.new cards: 4, layout: 'part3_layout.yml' do
   svg layout: data['class']
   svg file: data['art'], layout: 'art'
   text str: data['power'], layout: 'power'
-  save_png prefix: 'part5_', dir: '.'
-  hand file: 'part5_hand.png', dir: '.', trim_radius: 38
-  showcase file: 'part5_showcase.png', dir: '.'
+  save_png prefix: 'part5_'
+  hand file: 'part5_hand.png', trim_radius: 38
+  showcase file: 'part5_showcase.png'
 end
-