Adding new mturk CLI to setup.py.  Related to #1131.
Make the number of retries a class variable.  Fixes #1133.
Merge pull request #1134 from jamesls/sigv4-overrides

Switch SQS to Signature Version 4
Merge pull request #1136 from reversefold/dbsnapshot_update

Add update capabilities to DBSnapshot
Merge pull request #1137 from reversefold/dbsubnetgroupname_in_dbrestore

Support DBSubnetGroupName in RestoreDBInstanceFromDBSnapshot
Merge pull request #1149 from fsouza/develop

connection: use right host for tunneled https connections
Merge pull request #1152 from mikek/s3-post-form-fields-fix

S3Connection.build_post_form_args(): omit 'content-length-range' from fields list
Fix docstring for build_post_form_args.  Fixes #1153.
Merge branch 'develop' of github.com:boto/boto into develop
Fix enable_availability_zones and disable_availability_zones to return updated list of zones.  Related to #283.
Added keyring support.
Ensure retry_url, which is used to access the metadata server, is ignoring any proxy settings.  Also some PEP8 cleanup.  Fixes #1146.
keyring documentation
Merge pull request #1144 from dmcritchie/develop

Develop: Boto updates - mostly to mturk API
Backing off a change in make_request from last commit that broke everything except mturk.
Fix docstring for SNS topic params

These need to be ARNs and not just the name of the topic.
An attempt at a fix for #1144 that doesn't break other services.
Adding ivar documentation for the Key object.
Merge branch 'develop' of github.com:boto/boto into develop
Merge branch 'develop' of https://github.com/boto/boto into develop