Update GPL short presentation to convey the requirement some better.
Fixes #66
Rephrase GPL description to avoid modifications in favor of derivative.
Add the qualifier complete to the source code required.
Shorten first part of GPL description as per benbalter's input.
Remove 'whomever they distribute to'.
Compress images

Compress images using
[ImageOptim](https://github.com/pornel/ImageOptim) version 1.4.3
Merge pull request #81 from pathawks/gh-pages

Compress images
Merge pull request #79 from engelnyst/gpl

Short description of GPL on homepage