Support for building docs using gitbook added.

[lxsameer]

This PR add the support for building the current docs using gitbook tool. install gitbook-cli using yarn or npm and just run:

npm run build

the result would be under docs/build.
IMPORTANT NOTE: In order to create epub, mobi, and pdf files you need to install Calibre and set it up properly.

for more info checkout: https://toolchain.gitbook.com/ebook.html

[danielcompton]

Do you have a link from building this on your own fork so we can see what this will look like?

[lxsameer]

I'll upload them in my gh-pages branch and paste the link

[lxsameer]

here is the link to my gh-pages . sorry for the custom domain ( I messed up my configuration and didn't have time to fix it).

http://re-frame.lxsameer.com
http://re-frame.lxsameer.com/re-frame.pdf
http://re-frame.lxsameer.com/re-frame.mobi
http://re-frame.lxsameer.com/re-frame.epub

Also please note that this is not 100% done. We still need to tweak the docs a little bit and rearrange the structure to be much nicer. but it gives you an idea about the bigger picture.

[mike-thompson-day8]

Thanks!

[danielcompton]

This is live at https://d8.gitbooks.io/re-frame/content/.