Mongoose 3.x and other fixes

[panta]

Hi, I've updated the code to work with mongoose 3.x. I took the chance to also fix a couple of minor issue (missing BinaryParser in useTimestamps.js), and updated the test suite.

Cheers, Marco

[hannesgassert]

@bnoguchi will you pull this one? :)

[panta]

@hannesgassert while waiting for an upstream merge, if you want you can use https://npmjs.org/package/mongoose-3x-types (it's my fork repackaged with a different name as a npm module)