publish gh-pages branch via travis-ci.org

[brunobord]

refs #11, and https://medium.com/philosophy-logic/53a8270e87db

[MoOx]

I just setup this kind of behavior in a gulp workflow this morning
Enjoy commit message.

putaindecode/putaindecode.io#217

[n1k0]

So with 29e9389 you can already deploy to the gh-pages branch by running:

$ npm run deploy

Obviously this is tied to your local git repository configuration, so it won't work if you're not a repo contributor. Yeah, that means I'm the only one capable of using that command for now :p

Next step is to configure a travis build so it can use a gh personal access token to do that automatically for every commit landing to master.

[MoOx]

Next step is detailled is the previous PR I've linked so in this commit putaindecode/putaindecode.io@7beaf88 ;)
With a similar change you will have automatic deploy when YOU (or someone with write access that have added his token in the list) commit & push into master (so no other branch nor PR)