Reintroduced the ``reverse`` fix for DDB.

This is more backward-compatible than the previous attempt.
Fixed removing policies from listeners.
Merge pull request #2163 from toastdriven/refix-ddbv2-query-reverse

Reintroduced the ``reverse`` fix for DDB.
Fixed part of roboto for euca2ools.

Verified on euca2ools 2.1.4.
Merge pull request #2165 from toastdriven/fix-elb-policy-listeners

Fixed removing policies from listeners.

Fixes #1708.
Merge pull request #2166 from toastdriven/fix-for-euca2ools

Fixed part of roboto for euca2ools.

Fixes #1730.
Fix specification of elasticbeanstalk tier

According to the API: http://docs.aws.amazon.com/elasticbeanstalk/latest/api/API_CreateEnvironment.html
The ``member`` part of the Tier key names is not valid.
I was always getting:
{"Error":{"Code":"InvalidParameterValue","Message":"Environment tier definition not found","Type":"Sender"},"RequestId":"xxxxx"}

This allows an environment to be created and to specify the tier_name and tier_type.
Merge pull request #2168 from stuart-warren/beanstalk_tier

Fix specification of Elastic Beanstalk tier parameter. Fixes #2168.
Add support for setting failure threshold for Route53 health checks.
Add support for ELB Connection Draining attribute.
Merge pull request #2171 from jzbruno/develop

Add support for setting failure threshold for Route53 health checks. Fixes #2171, #2170.
Add connection draining tests. Add get attribute tests. Fix get_lb_attribute() to support AccessLog attributes.
Merge pull request #2174 from devicescape/develop

Add support for ELB Connection Draining attribute. Fixes #2174, #2173.
Update connection.py

Typo
Merge pull request #2178 from adrienbrunet/patch-1

Update connection.py
Clarified that MTurkConnection.get_assignments attributes are actually strings.

Fixes #2176.

I also edited a doctest accordingly.
Merge pull request #2187 from Kodiologist/develop

Clarify that MTurkConnection.get_assignments attributes are actually strings. Fixes #2187, #2176.
[MTurk CLI] Added "give-qual" and "revoke-qual" commands.
[MTurk CLI] Use all caps for positional metavars.
[MTurk CLI] Get all assignments, not just the first 100.