Fix setup.py and lint
Increment to version 0.5.1
Add a MANIFEST to include the .rst
Fix check for lockdir when attribute is missing
Use MongoClient for connection and update pymongo requirements to 2.4
Merge remote-tracking branch 'mitechie/fork'

Conflicts:
	mongodb_beaker/__init__.py
Merge remote-tracking branch 'pawciobiel/master'

Conflicts:
	mongodb_beaker/__init__.py
	setup.py
Python3 compatibility