adds arrays to vool

also symbols and some cleanup

lib/vool/array_statement.rb

@@ -0,0 +1,13 @@
+module Vool
+  class ArrayStatement
+    attr_reader :values
+
+    def initialize( values )
+      @values = values 
+    end
+
+    def length
+      @values.length
+    end
+  end
+end