[WIP] Resource tagging (#1332)

* Ran scaffold

* Made a start on get_resources.

* Added more EC2 to tag list

* More stuff

* Added more methods

* Added S3 region name

* Added values test

* Some final touchups

moto/resourcegroupstaggingapi/urls.py

@@ -0,0 +1,10 @@
+from __future__ import unicode_literals
+from .responses import ResourceGroupsTaggingAPIResponse
+
+url_bases = [
+    "https?://tagging.(.+).amazonaws.com",
+]
+
+url_paths = {
+    '{0}/$': ResourceGroupsTaggingAPIResponse.dispatch,
+}