Dynamo Snapshotting
simplify, use context.system from joournal actor instead of passing in via props
Fix dependency resolution error
Merge pull request #120 from eligosource/wip-sclasen-dynamo-snapshots

Dynamo Snapshotting
Updated Casbah driver and minor cleanup.

- Updated Casbah driver to 2.6.2
- Reflected driver version in Readme
- Added small load test to Casbah spec.

Fixes #119