Added screenshot for devs on Windows of MSVS2015 install settings.

docs/source/readme_install_devs.rst

@@ -0,0 +1,77 @@
+.. include:: ../../README.rst
+
+.. _install-dev:
+
+Installation for developers
+===========================
+
+Those that are interested in developing or contributing to gprMax should use the following installation guidance:
+
+1. Get the code
+2. Install Python and required Python packages
+3. Install a C compiler which supports OpenMP
+4. Compile the Cython extensions
+
+1. Get the code
+---------------
+
+* Use **Git** (https://git-scm.com) and clone the master branch of the repository: :code:`git clone https://github.com/gprMax/gprMax.git`
+
+2. Install Python and required Python packages
+----------------------------------------------
+
+We recommend using Miniconda to install Python and the required Python packages for gprMax in a self-contained Python environment. Miniconda is a mini version of Anaconda which is a completely free Python distribution (including for commercial use and redistribution). It includes more than 300 of the most popular Python packages for science, math, engineering, and data analysis.
+
+* Install the Python 3.5 version of Miniconda for your platform (http://conda.pydata.org/miniconda.html).  Follow the instructions (http://conda.pydata.org/docs/install/quick.html) if you are having any trouble.
+* Open a Terminal (Linux/Mac OS X) or Command Prompt (Windows) and navigate into the top-level gprMax directory.
+* Update conda :code:`conda update conda`
+* Create an environment (using the supplied environment file) for gprMax with all the necessary Python packages :code:`conda env create -f conda_env.yml`
+* Activate the new environment (Linux/Mac OS X) :code:`source activate gprMax` or (Windows) :code:`activate gprMax`.
+
+.. note::
+When you are finished using gprMax the Miniconda environment can be deactivated using (Linux/Mac OS X) :code:`source deactivate` or (Windows) :code:`deactivate`
+
+
+3. Install a C compiler which supports OpenMP
+---------------------------------------------
+
+Linux
+^^^^^
+
+* gcc (https://gcc.gnu.org) should be already installed, so no action is required.
+
+
+Mac OS X
+^^^^^^^^
+
+* gcc (https://gcc.gnu.org) is easily installed using the Homebrew package manager (http://brew.sh) :code:`brew install gcc --without-multilib`.
+
+.. note::
+
+Installations of Xcode on Mac OS X come with the LLVM (clang) compiler, but it does not currently support OpenMP, so you must install gcc.
+
+
+Microsoft Windows
+^^^^^^^^^^^^^^^^^
+
+* Download and install Microsoft Visual Studio 2015 Community (https://www.visualstudio.com/downloads/download-visual-studio-vs), which is free. Do a custom install and make sure under programming languages Visual C++ is selected, no other options are required.
+
+.. figure:: images/MSVS2015_install.png
+    :width: 200 px
+
+    Screenshot of Microsoft Visual Studio 2015 Community custom install settings.
+
+
+4. Compile the Cython extensions
+--------------------------------
+
+Once you have installed the aforementioned tools follow these steps to build the Cython extension modules for gprMax:
+
+a) Open a Terminal (Linux/Mac OS X) or Command Prompt (Windows) and navigate into the top-level gprMax directory.
+b) Compile the Cython extension modules using: :code:`python setup.py build_ext --inplace`. You should see a set of :code:`.c` source files and a set of :code:`.so` (Linux/Mac OS X) or :code:`.pyd` (Windows) compiled module files inside the gprMax directory.
+
+.. note::
+
+If you want to remove/clean Cython generated files, e.g. before rebuilding the Cython extensions, you can use :code:`python setup.py cleanall`.
+
+**You are now ready to proceed to running gprMax.**