Hi guys,

As I was reworking the x-modular-r2 eclass I found out that most of the
slowdowns for fonts were produced in fonts eclass.
Since we were the guys who are supposed to update it, I redesign it to
be bit faster and also to support all known eapis.

I would like to ask you to review the changes and spot anything that
might slipped my sight.

(Diff and full eclass attached)

Expected addition to main tree: if nothing huge is found after fosdem,
otherwise in 3 weeks

Cheers

Tomas