We don't need to ship argparse

argparse is available in python2.7 (archlinux) and on python-argparse package in debian. So
we add a dependency to this package.

bin/is

@@ -13,10 +13,10 @@ import datetime
 import re
 import fnmatch
 import warnings
+import argparse
 import installsystems
 import installsystems.printer
 import installsystems.tools as istools
-import installsystems.argparse as argparse # to be removed when python2.7
 from installsystems.printer import *
 from installsystems.repository import Repository
 from installsystems.repository import RepositoryManager

debian/control

@@ -15,7 +15,7 @@ Description: InstallSytems Installer
 
 Package: python-installsystems
 Architecture: all
-Depends: ${misc:Depends}, ${python:Depends}, python-paramiko
+Depends: ${misc:Depends}, ${python:Depends}, python-paramiko, python-argparse
 XB-Python-Version: ${python:Versions}
 Description: InstallSystems Python modules
  This package provides InstallSystems framework

installsystems/template.py

@@ -21,7 +21,7 @@ parser = """# -*- python -*-
 # parser object is installsystems argument parser
 
 import os
-import installsystems.argparse as argparse
+import argparse
 from installsystems.printer import arrow
 
 class TargetAction(argparse.Action):