ECS conductivity work - nearly works, just need to sort out the conformal state solver.

Goodbye to AbstractStateWrapper - can use std::tr1::shared_ptr, much nicer

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Merge branch 'master' of https://github.com/coolprop/coolprop
No more deletes used anywhere in the codebase.  Only std::tr1::shared_ptr are used.  Should be portable solution.

All tests run, no memory leaks according to VLD

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