fix(privacy): use base64 image to prevent privacy issue

Images are linked to my server so it's possible to track down people reading my people and I don't want that.
Using [`base64`](https://en.wikipedia.org/wiki/Base64) image will also add the advantage to reinforce layout robustness.

### How to convert
See [imagetobase64.com](http://imagetobase64.com/) for conversion.
fix(width): resolve table width issue

The table break the layout, that's really annoying for people!
fix(width): resolve table width issue
refactor(favicon): use external images

Base64 is no good, as the signature become to long.
docs(base64): explain Why not Base64 images ?
docs(branch): details about various branches