Modify GitHub Pages to use the master branch

[vincentfretin]

@dmarcos Can you please go to the repository settings and modify Github Pages configuration to use the master branch.
It should be like this:

Then modify the repo description and change the link to https://supermedium.github.io/aframe-environment-component/
Thanks!

[dmarcos]

Just saw this. In general I prefer to have gh-pages and master separate so there's more control in case things break on master

[dmarcos]

gh-pages should reflect the latest release

[vincentfretin]

I'm ok with any solution. You didn't merge #79 at the same time as #78 to maintain the gh-pages so I proposed an alternative to have less steps for you to maintain things.