Dependency tree quite large

[endel]

Hi there, first of all, I'd like to thank the authors of this library, I'm taking my first steps and it all looks so simple and powerful!

I'd like to warn though about the dependency tree, which is quite large (see the visualization below)

Apparently, 1/3 of it can be removed by replacing the request module with plain Node.js "http" module (https://github.com/OptimalBits/dolphin/pull/6)