inner product of QD vectors
z = qdip(x,y)
2 column vectors of real QD numbers, of same lengths.
QD number = x'*y
--> z = qdip(x,y) z = 3.56017539281641690795690874906301351451295011400674390166429558E0 --> z == x' * y ans = T --> sqrt(qdip(x,x)) == norm(x,2) ans = T