Add license information in setup.py

Add logger parameter and update documentation on customer HTTP clients

Update documentation on thread-safety and add API for pregel

Fix a bug in BaseCollection.properties method

Merge branch 'dev'

Add new parameters for graph API methods

Duplicate methods in arango.client.ArangoClient to arango.database.Da…

…tabase for non-root access

Merge branch 'master' of github.com:joowani/python-arango

Merge pull request arangodb#37 from joowani/develop

Add parameter replication_factor to method Database.create_collection

Add Database.get_document method to allow direct retrieval of documen…

…ts by ID