Most of the way to a Gauss-Jordan Eliminaton procedure.

Signed-off-by: Bjorn Westergard <bjorn@helmholtz.(none)>
Pivot function added. Not sure this is cleanest, or even needed.

Signed-off-by: Bjorn Westergard <bjorn@helmholtz.(none)>
Pivot used in sort.

Signed-off-by: Bjorn Westergard <bjorn@helmholtz.(none)>
2.35

Signed-off-by: Bjorn Westergard <bjorn@helmholtz.(none)>
2.31

Signed-off-by: Bjorn Westergard <bjorn@helmholtz.(none)>