Added parameter for path to JSON_to_CPP.py

set path through --path that is the root directory for the code. The
default is None as this was the previous behavior, however this does not
make sense.

Also the path name is normalised as, depending on OS there is confusion
on slash direction.
Added cmake

CMakeLists.txt is usually placed in the root folder, this is a basic
cmake file that will do everything nessesary to build the program as
either as a library of another program or by itself.
Merge pull request #26 from Rod-Persky/cmake

Added cmake. Thank you for the contribution. We thought about CMake for a while, but I never got it to work properly. I am sure there will be some more questions very soon, but I'll merge it for now. Thanks again!
Fixed a path typo (Windows, Windows...)
Path

generate_headers.py may not be called from the correct path, so get the
path of generate_headers.py and determine the base path from there
assuming generate_headers.py will be in dev/
corrected dynamic headers program

JSON_to_CPP replaced with generate_headers.py. See python-args branch
and #1
readme stub in dev/

Basic description of how to build coolprop.
Merge pull request #27 from Rod-Persky/cmake

Cmake
Merge pull request #25 from Rod-Persky/python-args

Added parameter for path to JSON_to_CPP.py
Started on tests
Added catch tests for polymath
Updated Catch Macro blocks

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