Added a file with information about documentation generation

Web/develop/documentation.rst

@@ -0,0 +1,38 @@
+.. _developer_documentation:
+
+*************
+Documentation
+*************
+
+Build Sphinx documentation
+--------------------------
+
+1. Check out the sources in the CoolProp/Web folder
+
+    git clone https://github.com/CoolProp/CoolProp --recursive
+
+Make a virtualenv - helps to keep sane ! 
+
+    virtualenv ~/env/py27
+    source ~/env/py27/bin/activate # Turn on this virtual env, should see (py27) in your command shell next to the prompt to tell you that environment is active
+
+Then install prerequisites into this virtualenv:
+  
+    pip install Cython
+    pip install CoolProp sphinx sphinxcontrib-doxylink cloud-sptheme ipython matplotlib numpy scipy
+
+To build the documentation, go into the CoolProp/Web folder and run:
+
+    make html
+  
+Build Doxygen documentation
+---------------------------
+
+All the configuration is done in the ``Doxyfile`` file.
+
+1. If you don't have doxygen, install it from `doxygen downloads <http://www.stack.nl/~dimitri/doxygen/download.html>`.  Or on linux a ``sudo apt-get install doxygen`` should do it.
+
+2. Simply fire up a shell in the root of the repo, and type 
+
+  doxygen Doxyfile
+