Expose Request class

[regality]

This exposes the Request class so that the following is possible:

var request = require('request');

// disable strictSSL globally
request.Request.prototype.strictSSL = false;

Currently, this is only possible with request.defaults(), which is rather cumbersome when request is used in a lot of different places.

[mikeal]

keep in mind that setting that property is unlikely to truly be global since different dependencies will get their own versions of request.

[ebdrup]

What's the release plan? When can I expect this to make it to npm? :-)