fixed run command builder, now takes target parameter, also accepts system

commands.

Also:
* changed Rakefile to remove the -k flag from bacon test
* changed pry_instance attr_reader to attr_accessor in CommandProcessor class
* updated tests to reflect new `run` parameters

Rakefile

@@ -30,7 +30,7 @@ def apply_spec_defaults(s)
 end
 
 task :test do
-  sh "bacon -k #{direc}/test/test.rb"
+  sh "bacon #{direc}/test/test.rb"
 end
 
 desc "run pry"

lib/pry/command_base.rb

@@ -68,19 +68,26 @@ class Pry
       end
 
       # Execute a command (this enables commands to call other commands).
+      # @param [Binding] target The current target object.
       # @param [String] name The command to execute
       # @param [Array] args The parameters to pass to the command.
       # @example Wrap one command with another
       #   class MyCommands < Pry::Commands
       #     command "ls2" do
       #       output.puts "before ls"
-      #       run "ls"
+      #       run target, "ls"
       #       output.puts "after ls"
       #     end
       #   end
-      def run(name, *args)
-        action = opts[:commands][name][:action]
-        instance_exec(*args, &action)
+      def run(target, name, *args)
+        command_processor =  CommandProcessor.new(target.eval('_pry_'))
+        
+        if command_processor.system_command?(name)
+          command_processor.execute_system_command("#{name} #{args.join}")
+        else
+          action = opts[:commands][name][:action]
+          instance_exec(*args, &action)
+        end
       end
 
       # Import commands from another command object.

lib/pry/command_processor.rb

@@ -7,7 +7,7 @@ class Pry
 
     extend Forwardable
     
-    attr_reader :pry_instance
+    attr_accessor :pry_instance
     
     def initialize(pry_instance)
       @pry_instance = pry_instance

test/test.rb

@@ -492,7 +492,7 @@ describe Pry do
               end
 
               command "run_v" do
-                run "v"
+                run target, "v"
               end
             end