Added countries app with get views (filter view and get by alpha2 view)

solution/pulse/countries/models.py

@@ -0,0 +1,11 @@
+from django.db import models
+
+
+class Country(models.Model):
+    name = models.CharField(max_length=100)
+    alpha2 = models.CharField(max_length=2)
+    alpha3 = models.CharField(max_length=3)
+    region = models.CharField()
+
+    def __str__(self):
+        return self.name