add Balance fallback via GenericSchur for non-BlasFloat

[ChrisRackauckas]

Fixes #81

[RalphAS]

The permutations for the balance! version should be

   if ilo > 1       # apply lower permutations in reverse order
        for j in (ilo-1):-1:1; rcswap!(j, B.prow[j], X) end
    end
    if ihi < n       # apply upper permutations in forward order
        for j in (ihi+1):n;    rcswap!(j, B.pcol[j-ihi], X) end
    end