fonts: update and documenting new font identifier
fonts: update and documenting new font identifier

* reference the new project home for OpenSource "material-icons-font"
* introduce woff2 files
* TL;DR: why using woff2 format is recommended

Signed-off-by: Ralf Zerres <a55c5beace021459791f5070a9a90148cd697b8f@networkx.de>

redox-os/orbtk