Import py27-delay-0.1.1 as wip/py-delay.

pydelay is a program which translates a system of delay differential
equations (DDEs) into simulation C-code and compiles and runs the code
(using scipy weave)
Resurrection of Makefile.
Remove hs-ghc-mtl, imported to pkgsrc/devel.
Remove hs-texmath, imported to pkgsrc/textproc.
Remove qt5, pkgsrc version is newer.