Added parallel evaluation of residual helmholtz terms

Should in the end only slow down by 1.2x, but calculate at least up to second order derivatives all at once, so net speedup of 5 if calculating all first and second order partials !!

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Removed additional space from header in web template

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Updated codelite and added Tabular backend structure

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Silenced a few warnings

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Updated main with speed testing for parallel derivatives of power term

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Merge branch 'master' of https://github.com/coolprop/coolprop