Adjusted reference states for isobutane and co2 to IIR

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Merge branch 'master' of https://github.com/ibell/coolprop
Added more compiler flags for Martin, code should be optimized with loop-unrolling and fast-math option
This make TTSE work for water and more in Modelica..
And option /GL makes a too large lib file, that slows compilation, thus removed

Signed-off-by: Martin Ryhl Kærn <pmak@mek.dtu.dk>
Signed-off-by: Martin Ryhl Kærn <pmak@mek.dtu.dk>
Signed-off-by: Martin Ryhl Kærn <pmak@mek.dtu.dk>
Merge pull request #2 from kaern/tst

I just play around to find out what I am doing..