ErgoDox EZ additions and tweaks

[ezuk]

Hi @robotmaxtron -- please see PR, let me know what you think. Thanks!

[robotmaxtron]

@ezuk Thanks for the PR. Instead of committing directly to gh-pages, would you mind adjusting a few things?

• Instead of submitting a PR to the gh-pages branch, please submit them directly to master so the changes don't get overwritten during the next jekyll build and it'll be easier to preview and build them locally before they are pushed to the live site.
• The _site directory is not needed, the _config.yml file destination: ../deploy will automatically put them in the deploy directory.
• The line 'It also comes with a custom-made wrist rest...' should be changed to indicate that it's a separate item that will either needed to be purchased separately or as part of a bundle. This is also the case for the Tilt/Tent kit.
• The line 'ErgoDox EZ graphical configurator Configuration' seems like it should be changed to be 'ErgoDox EZ Graphical Configurator' or something similar.

I think the Sponsorship logo looks fantastic, the other changes to the EZ section are welcome and appreciated. Once these things are changed, I'll be happy to accept the PR, build and test locally before pushing to the live site.