export HAProps function for Javascript

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Merge branch 'master' of https://github.com/ibell/coolprop
Fixed bug with PS inputs that caused problems in EES (https://github.com/ibell/coolprop/issues/93).  Weird that no other tests caught this problem before

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