Updated Readme and made small changes to Importer script

core/migrations/0011_auto_20181001_1259.py

+# Generated by Django 2.1 on 2018-10-01 12:59
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0010_auto_20180805_1139'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='submissiontype',
+            name='programming_language',
+            field=models.CharField(choices=[('c', 'C syntax highlighting'), ('java', 'Java syntax highlighting'), ('mipsasm', 'Mips syntax highlighting'), ('haskell', 'Haskell syntax highlighting')], default='c', max_length=25),
+        ),
+    ]