fix symbolic link on bin

cli.rb

@@ -5,7 +5,9 @@
 
 require 'rubygems'
 require 'highline/import'
-require './MPW.rb'
+require 'pathname'
+
+require "#{APP_ROOT}/MPW.rb"
 
 class Cli
 

mpw

@@ -5,7 +5,10 @@
 
 require 'rubygems'
 require 'optparse'
-require './cli.rb'
+require 'pathname'
+
+APP_ROOT = File.dirname(Pathname.new(__FILE__).realpath)
+require "#{APP_ROOT}/cli.rb"
 
 options = {}
 OptionParser.new do |opts|