Remove mock from Python 3 requirements.
Add dynamodb2 to whitelist
Remove code for Python 2.5 compatibility.
Fix __nonzero__ => __bool__
Fix some tests.
Merge remote-tracking branch 'origin/develop' into dynamo2-py3

Conflicts:
	boto/dynamodb/types.py
	tests/test.py
Fix tests.
Treat bytes as binary type on Python 3.
Fix integration tests.
Fix integration tests.
Update README
Loading binary from dynamodb returns dynamodb.types.Binary.
Fix tests.
Various fixes for DynamoDB + Python 3

This adds a `Binary().value` to stay compatible with the Python 2
version of the `Binary` type, and updates several tests so they
work across the board from Python 2.6 - 3.4 (and pypy).
Use skip decorator for py2/py3 tests
Merge pull request #2473 from danielgtaylor/ddb-py3

dynamodb2 module: add backward-compatible support for Python 3.3+. Fixes #2473, #2453.