Jason

Getting this when installing: ``` npm WARN deprecated [email protected]: This package is discontinued. Use lodash@^4.0.0. ``` Looks like this is coming from [an old version of xmlbuilder-js](https://github.com/oozcitak/xmlbuilder-js/blob/v2.4.6/package.json#L25) that [this package...

Getting this when installing `ims-lti`: ``` npm WARN deprecated [email protected]: Use uuid module instead ``` I think it's [coming from here](https://github.com/omsmith/ims-lti/blob/master/package.json#L39).

Calling code may want to know when calls to `@redis.get` or `@redis.set` fail. For example, [in this code, `err`](https://github.com/omsmith/ims-lti/blob/master/src/redis-nonce-store.coffee#L31) should be handled when `@redis.get` fails, perhaps because the redis client...

It looks like the [error classes](https://github.com/omsmith/ims-lti/blob/master/src/errors.coffee) don't behave like a [Javascript Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error): ```coffee it.only 'should return false if nonce already seen', (done) => req = url: '/test' method: 'POST' connection:...