turned back on the ability to copy state classes

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Fixed p,d in vapor domains at extremely low pressure

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Work on notebook on phase envelope

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Liquid and vapor pressure ancillaries fit separately.

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
javascript wrapper only uses SI units now

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Merge @jowr changes to state and TTSE

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

Conflicts:
	CoolProp/CPState.h
	CoolProp/gitrevision.h

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