Reactive Journal upgrade to version 0.9-AKKA-2.2.0-RC1-SNAPSHOT

- Because ReactiveMongo has not upgraded to Akka 2.2.x yet we pulled and upgraded the source to Akka 2.2. These libraries are stored in Eligosource-snapshot repo until reactive is upgraded to Akka 2.2.x.
- The MongodbReactiveJournal now uses the ReactiveMongo 0.9 code base.
- Added 2 additional indexes to the ReactiveMongo journal for counter and replay.
- Added logging when a GetLastError encounters a failure.
- Changed connection.close to connection.askClose()
- Upgraded Embedded Mongo to current version for both the Reactive and Casbah journals.

Fixes #109
Merge pull request #117 from eligosource/wip-109-reactive-upgrade

Reactive Journal upgrade to version 0.9-AKKA-2.2.0-RC1-SNAPSHOT