Introduce a simple API DSL

This is desirable when you don't want to mix Vero directly into your
models, and do not desire the verbosity of accessing the API modules
directly. Example usage:

  class UsersController < ApplicationController
    include Vero::DSL

    def update
      vero.users.track!({ ... })
    end
  end
Merge pull request #25 from jherdman/introduce-api-dsl

Introduce a Simple API DSL