Fixed relative import error referenced in pr#2

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = tufw
-version = 1.1.1
+version = 1.1.2
 author = Alessandro Campolo
 author_email = [email protected]
 description = Ufw terminal frontend based on dialog

src/tufw/__init__.py

@@ -1,10 +1,13 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from errno import ENOENT
 from os import execlp, getuid
 from sys import argv, executable
 
 from dialog import Dialog
-from firewall import *
+try:
+	from .firewall import *
+except ImportError:
+	from firewall import *
 
 
 def elevate():