Added paradox for list-packages alternative with perspectives support

I am having trouble making these layers lightweight though... they add 0.3 seconds to startup, any tips on how to use `use-package` ?
It supposedly  autoload paradox, so that means it's not loaded until you invoke it first. Then checks out if custom-persp is defined ( from my old perspective package ) and if it if, it defines a custom-persp for this paradox-list-packages, if not, it just uses it the old way