Adds for splitter

lib/rcircuit.rb

@@ -7,3 +7,4 @@ require_relative "rcircuit/or.rb"
 require_relative "rcircuit/xor.rb"
 require_relative "rcircuit/adder.rb"
 require_relative "rcircuit/vcd.rb"
+require_relative "rcircuit/splitter.rb"

lib/rcircuit/port.rb

@@ -105,6 +105,17 @@ class Port
   def !
     return NotGate.new(self).out
   end
+  
+  def [](*args)
+    if args.length == 1
+      #single bit or range
+      bits = args[0]
+    else
+      #an array of bits, passed as multiple arguments
+      bits = args
+    end
+    return Splitter.new(self, bits).out
+  end
 
   protected