README: add a new one using ReST

Hopefully this is a little more useful for people opening the GitHub project
page and can serve the role of a poor man's project website.
osxbundle: fix unicode support in fonts.conf

Looks like unicode support was broken with this simple `fonts.conf`. Copy more
(all) of fontconfig's default `fonts.conf`.

Fixes #13

Signed-off-by: Stefano Pigozzi <stefano.pigozzi@gmail.com>