beanstalk module: add backward-compatible support for Python 3.3+
adjust docs to be able to merge with current code
fix unittest import for python 2.6 compatibility
vpc module: add backward-compatible support for Python 3.3+
allow dict instances in all filters param, and fix tests by using an OrderedDict
move filters compatibility code to EC2Connection.build_filter_params
Merge pull request #2399 from felixonmars/vpc-py3

vpc module: add backward-compatible support for Python 3.3+. Fixes #2399.
ec2 module: add backward-compatible support for Python 3.3+
fix test_describe_snapshots by using OrderedDict
Merge pull request #2424 from felixonmars/ec2-py3

ec2 module: add backward-compatible support for Python 3.3+. Fixes #2424.
Fix Beanstalk exception handling
Add a coupld tests to create exception classes from error code names
Merge pull request #2431 from danielgtaylor/beanstalk-exception

Fix Beanstalk exception handling. Fixes #2431.
Merge pull request #2372 from felixonmars/beanstalk-py3

beanstalk module: add backward-compatible support for Python 3.3+. Fixes #2372.