Adding intitial DynamoDB setup and implementing ListTables target

tests/test_dynamodb/test_dynamodb.py

@@ -0,0 +1,12 @@
+import boto
+
+from moto import mock_dynamodb
+from moto.dynamodb import dynamodb_backend
+
+
+@mock_dynamodb
+def test_create_table():
+    name = "TestTable"
+    dynamodb_backend.create_table(name)
+    conn = boto.connect_dynamodb('the_key', 'the_secret')
+    assert conn.list_tables() == ['TestTable']