Parse refprop HMX.BNC file and load coefficients (#1304)

* Add parser for HMX.BNC from REFPROP; closes #1294

Also move configuration variables into main pybind11 module

* Add the ability to over-write departure functions and binary interaction parameters

src/Configuration.cpp

@@ -138,24 +138,3 @@ void set_config_as_json_string(const std::string &s){
 }
 
 }
-
-#if defined(PYBIND11)
-
-#include <pybind11/pybind11.h>
-namespace py = pybind11;
-
-// Add Configuration variables to pybind11 wrapper
-void init_CoolProp_Configuration_constants(py::module &m)
-{
-    // See http://stackoverflow.com/a/148610 and http://stackoverflow.com/questions/147267/easy-way-to-use-variables-of-enum-types-as-string-in-c#202511
-    
-    py::enum_<configuration_keys>(m, "configuration_keys")
-    #define X(Enum, String, Default, Desc) \
-        .value(String, configuration_keys::Enum)
-        CONFIGURATION_KEYS_ENUM
-    #undef X
-    .export_values();
-}
-
-#endif
-