The start of support for 8-way IRIP designs

-calc.genoprob calls the correct C function
-readMWril accepts "ri8selfIRIP1" as a design. In this case it ignores
cross input.
-summary.cross supports new type
-Added C code to support the hidden Markov model (hmm_riselfIRIP1.c,
hmm_riselfIRIP1.h)
-Added C code for reviseMWrilNoCross which doesn't use cross input