Merge branch 'core-224-ugettext_lazy-deprecated' into 'master'

Replace ugettext_lazy by gettext_lazy. Advances AlekSIS#224

See merge request !41

aleksis/apps/alsijil/forms.py

@@ -2,7 +2,7 @@ from datetime import datetime
 
 from django import forms
 from django.db.models import Count
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from django_select2.forms import Select2Widget
 

aleksis/apps/alsijil/menus.py

-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 MENUS = {
     "NAV_MENU_CORE": [

aleksis/apps/alsijil/models.py

 from django.db import models
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from aleksis.core.mixins import CRUDMixin
 

aleksis/apps/alsijil/tables.py

-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 import django_tables2 as tables
 from django_tables2.utils import A