Add management command to populate languages

lang/management/commands/setuplang.py

+from django.core.management.base import BaseCommand, CommandError
+from lang.models import Language
+from translate.lang import data
+
+class Command(BaseCommand):
+    help = 'Populates language definitions'
+
+    def handle(self, *args, **options):
+        for code, props in data.languages.items():
+            lang, created = Language.objects.get_or_create(
+                code = code,
+                name = props[0],
+                nplurals = props[1],
+                pluralequation = props[2])
+