Merging in latest boto.

Changelog.rst

Index: Changelog.rst
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+==============
+Change history
+==============
+
+.. contents::
+    :local:
+
+.. _version-2.0:
+
+2.0
+===
+:release-date: 2011-07-14
+
+.. _v20-important:
+
+Important Notes
+---------------
+
+* Backwards-incompatible filter changes in the latest 2011 EC2 APIs
+
+    In the latest 2011 EC2 APIs all security groups are assigned a unique
+    identifier (sg-\*).  As a consequence, some existing filters which used to take
+    the group name now require the group *id* instead:
+
+    1. *group-id* filter in DescribeInstances (ie get_all_instances())
+
+        To filter by group name you must instead use the *group-name* filter
+
+    2. *launch.group-id* filter in DescribeSpotInstanceRequests (ie get_all_spot_instance_requests())
+
+        Unfortunately for now, it is *not* possible to filter spot instance
+        requests by group name; the security group id *must* be used instead.
+
+    This new security group id can be found in the *id* attribute of a boto
+    SecurityGroup instance.