locking down tightly the raven version to try to sneek it through ripple's batch-install
getting rid of VS artifacts that were blowing up on the CI server
helpers to swap a database at runtime.  Closes GH-13
slightly better test cleanup
updated to raven 2.5.2750
Merge pull request #15 from bobpace/ravenUpdate

updated to raven 2.5.2750
we'd forgotten to adjust the ripple nuspecs after upgrading RavenDb