fix typo - windows installing only

setup.py

@@ -322,7 +322,7 @@ install_requires=['pycrypto>=2.6',
                   'colorama>=0.2.4']
 
 if sys.platform.startswith('win'):
-    install_requires.append('pyreadeline')
+    install_requires.append('pyreadline')
 
 
 long_description = u"""\