DATAMONGO-740 - Prepare next development iteration.
DATAMONGO-751 - Prepare 1.3.1.RELEASE.
DATAMONGO-751 - Release version 1.3.1.RELEASE.
DATAMONGO-789 bump version
DATAMONGO-789 add authenticationDatabase option to MongoDB UserCredentials
Merge commit '3059d7f891524e3e503a5d7db5c20ed26740d895'

Conflicts:
	README.md
	pom.xml
	spring-data-mongodb-cross-store/pom.xml
	spring-data-mongodb-distribution/pom.xml
	spring-data-mongodb-log4j/pom.xml
	spring-data-mongodb/pom.xml
	spring-data-mongodb/src/test/java/org/springframework/data/mongodb/config/MongoNamespaceTests.java