Trying to follow Matthis advice.

Signed-off-by: jowr <jowr@mek.dtu.dk>
for a discussion see https://github.com/ibell/coolprop/issues/61
Merge pull request #5 from thorade/indexReduction

for a discussion see https://github.com/ibell/coolprop/issues/61
Completed changes for index reduction, BranchingDynamicPipes model can simulate now, this should add a lot of stability thanks to Matthis

Signed-off-by: jowr <jowr@mek.dtu.dk>
Merge branch 'refs/heads/indexReduction'