Updated JSON files with excess and reducing parameters

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Replaced cair_sat (https://github.com/ibell/coolprop/issues/82)

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Fixed (?) issue with get_col (https://github.com/ibell/coolprop/issues/81)

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
New headers from JSON code

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Added parameters to Mixture class for HFC mixtures, other small changes

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