Updating example plugin with pre_remove, static js, template file, and a model.

examplePlugin/models.py

@@ -1,3 +1,9 @@
 from django.db import models
 
-# Create your models here.
+
+class ExamplePlugin(models.Model):
+    name = models.CharField(unique=True, max_length=255)
+
+    class Meta:
+        # db_table = "ExamplePlugin"
+        pass