Modularizing LEAP and installation notes

[wingillis]

Hi Talmo,

I've been testing out your LEAP framework, and so far it's been working very well! I've made some modifications to the codebase and readme.md to make it easier to install LEAP and use it with matlab. I've turned leap into a module so that a user can install it like any other python package with pip and in the readme I've added some notes on how to use matlab if a user has multiple anaconda environments. Feel free to merge any of this code into your own codebase, or not - I just wanted to share how I got LEAP working on my mac!

Thanks, Win

[talmo]

Hi Winthrop,

Thank you so much for the terrific work you've done here!! This will definitely help many users with the installation process. The code changes all look good to me -- I'll just test it out on a PC and merge the PR.

Thanks again for the contributions!!

Talmo

PS: say hi to Bob for us!