Adding describe table end point

moto/dynamodb/responses.py

@@ -1,5 +1,6 @@
 import re
 import json
+
 from .models import dynamodb_backend
 
 
@@ -28,6 +29,11 @@ class DynamoHandler(object):
         response = {"TableNames": tables}
         return json.dumps(response)
 
+    def DescribeTable(self, uri, body, headers):
+        name = json.loads(body)['TableName']
+        table = dynamodb_backend.tables[name]
+        return json.dumps(table.describe)
+
 
 def handler(uri, body, headers):
     return DynamoHandler(uri, body, headers).dispatch()