Update README to match current snapshot version

In order to reduce the confusion which can be see in https://github.com/zenexity/Play-ReactiveMongo/issues/12, update the version number in the readme.
Integrated the new BSON library + new Collection API from ReactiveMongo 0.9
removed noisy println statements
Merge pull request #17 from betehess/remove-println-statements

removed noisy println statements
Merge pull request #14 from jeantil/patch-1

Update README to match current snapshot version
Merge remote-tracking branch 'upstream/master' into channels-config

Conflicts:
	src/main/scala/play/modules/reactivemongo/ReactiveMongoPlugin.scala