Typos and unused imports

Follow-up #165

Fix #159

coin/billing/app.py

@@ -2,10 +2,8 @@
 
 from __future__ import unicode_literals
 from django.apps import AppConfig
-import coin.apps
 
 
 class BillingConfig(AppConfig):
     name = 'coin.billing'
     verbose_name = 'Facturation'
-

coin/isp_database/app.py

@@ -2,10 +2,8 @@
 
 from __future__ import unicode_literals
 from django.apps import AppConfig
-import coin.apps
 
 
 class ISPdatabaseConfig(AppConfig):
     name = 'coin.isp_database'
-    verbose_name = 'Identité du FaI'
-
+    verbose_name = 'Identité du FAI'

coin/members/app.py

@@ -2,10 +2,7 @@
 
 from __future__ import unicode_literals
 from django.apps import AppConfig
-import coin.apps
-
 
 class MembersConfig(AppConfig):
     name = 'coin.members'
     verbose_name = 'Membres'
-

coin/offers/app.py

@@ -2,10 +2,8 @@
 
 from __future__ import unicode_literals
 from django.apps import AppConfig
-import coin.apps
 
 
 class OffersConfig(AppConfig):
     name = 'coin.offers'
     verbose_name = 'Offres et Abonnements'
-

simple_dsl/app.py

@@ -2,10 +2,8 @@
 
 from __future__ import unicode_literals
 from django.apps import AppConfig
-import coin.apps
 
 
 class SimpleDSLConfig(AppConfig):
     name = 'simple_dsl'
     verbose_name = 'xDSl'
-

vpn/apps.py

@@ -9,6 +9,6 @@ from . import urls
 
 class VPNConfig(AppConfig, coin.apps.AppURLs):
     name = 'vpn'
-    verbose_name = "Gestion d'accès VPN"
+    verbose_name = "Tunnels VPN"
 
     exported_urlpatterns = [('vpn', urls.urlpatterns)]