fix: Turtle.BoxFractal ( Fixes PoshWeb#37 )

Adding examples and making L, LSystem

Author: James Brundage

Types/Turtle/BoxFractal.ps1

@@ -1,10 +1,27 @@
-
+<#
+.EXAMPLE
+    $turtle.PatternAnimation = ''    
+    $turtle.Clear().BoxFractal().Pattern.Save("$pwd/BoxFractal.svg")
+    
+.EXAMPLE
+    $turtle.Clear()
+    $turtle.BoxFractal(10,4)
+    $turtle.PatternTransform = @{
+        'scale' = 0.9        
+    }
+    $turtle.PatternAnimation = "
+    <animateTransform attributeName='patternTransform' attributeType='XML' type='scale' values='1;0.9;1' dur='19s' repeatCount='indefinite' additive='sum' />
+    <animateTransform attributeName='patternTransform' attributeType='XML' type='skewY' values='0;-30;30;-30;0' dur='67s' repeatCount='indefinite' additive='sum' />
+    <animateTransform attributeName='patternTransform' attributeType='XML' type='skewX' values='0;-30;30;-30;0' dur='83s' repeatCount='indefinite' additive='sum' />
+    "
+    $turtle.Pattern.Save("$pwd/BoxFractal2.svg")
+#>
 param(
     [double]$Size = 20,
     [int]$Order = 4,
     [double]$Angle = 90
 )
-return $this.L('F-F-F-F',  [Ordered]@{
+return $this.LSystem('F-F-F-F',  [Ordered]@{
     F = 'F-F+F+F-F'
 }, $Order, [Ordered]@{
     '\+'    = { $this.Rotate($Angle) }