Add plain text synonym for `&`.

[kindaro]

So, & is the fundamental construction operation, there is no way around using it. But it clashes with the flipped $ function application defined in base.Data.Function, that is extensively used, for instance, in diagrams, and elsewhere when a more "object oriented" feel is desirable.

Therefore, I propose that we have a synonymous name like insert that can be used when & of DynGraph conflicts with the more widely used & from base.

[athas]

This seems like a good idea. A definition insert = (&) is pretty harmless and sometimes useful.

[kindaro]

Thank you Troels!