[TENTATIVE PATCH] Digraph implementation for Evil

[Nikolai Weibull]

Hi!

So I have an implementation of RFC1345 digraphs that I’ve been using
with viper/vimpulse.  I would like to donate it to Evil and figured I
might as well write the integration patch as well.  There does,
however, not seem to be any insert mode commands yet, so I don’t have
an example to follow.  If this is something that’s coming, then I can
wait.  If I have, however, failed to read the source properly, could
someone please point me in the right direction?

Thanks!