Run specs on Node

Some specs are broken when run under Node.
Fix the (lack of) use of `config.read` on Node
Merge pull request #40 from Stuk/read-node

Run specs on Node and fix `config.read` when running on Node
Add mop-integration testing
Don't test on Node 0.8 as stream API changed...

...which is used in the mop-integration tests. Mr doesn't really
depend on multiple Node versions anyways.