Eww, hard to sum up…

- Update django-allauth-cas to the last version.
- Add docs (README, example/README).
- Add tests for Clipper provider.
- Add tests to check templates do not contain syntax error.
- Add the last missing templates to override all allauth's displayable
  templates.
- Improve stylesheets.

example/app/fixtures/data.json

@@ -1,9 +1,9 @@
 [
 {
-    "model": "testapp.user",
+    "model": "auth.user",
     "pk": 1,
     "fields": {
-        "password": "pbkdf2_sha256$36000$RNuQMJ1hqN0P$GFFyxtTONjkh4IUMifNYrsXs4/SnX5uMnGtRNR2WrFo=",
+        "password": "pbkdf2_sha256$100000$WDs2nLZ0eIl1$oNqrYphOf0AVRQ8aPIA3g7xM2gI8/c8NJkp2geVT7mc=",
         "last_login": null,
         "is_superuser": false,
         "username": "user",
@@ -13,19 +13,15 @@
         "is_staff": false,
         "is_active": true,
         "date_joined": "2017-07-03T10:10:18.675Z",
-        "departement": "",
-        "occupation": "1A",
-        "phone": "",
-        "promo": 2016,
         "groups": [],
         "user_permissions": []
     }
 },
 {
-    "model": "testapp.user",
+    "model": "auth.user",
     "pk": 2,
     "fields": {
-        "password": "pbkdf2_sha256$36000$NFfbdDHHuq0A$auDXrWn6xr+FnsAOW8uq0aa8m2kyUPtgY/QgThMDKF0=",
+        "password": "pbkdf2_sha256$100000$EjBzWe7Ce5Bc$abqTFywweKuMaRux2MMUwcLchcwxmXGduN320oYaV28=",
         "last_login": null,
         "is_superuser": true,
         "username": "root",
@@ -35,12 +31,16 @@
         "is_staff": true,
         "is_active": true,
         "date_joined": "2017-07-03T10:10:36.413Z",
-        "departement": "",
-        "occupation": "1A",
-        "phone": "",
-        "promo": 2016,
         "groups": [],
         "user_permissions": []
     }
+},
+{
+    "model": "sites.Site",
+    "pk": 1,
+    "fields": {
+        "name": "Example Site",
+        "domain": "localhost"
+    }
 }
 ]