added draft README files

IRIDIS.md

+# Compiling and running pivtools on IRIDIS
+
+## Dependencies
+
+This code depends on some external libraries:
+* fftw
+* gsl
+
+To run this code on the IRIDIS compute cluster, you will need to make sure you have loaded appropriate libraries
+
+    module load fftw/3.3.7/gcc
+    module load gsl
+    module load matlab
+
+To compile it, you will need to make sure MATLAB has the appropriate path to your libraries.
+
+You can check what this is with
+
+    module show fftw/3.3.7/gcc
+    module show gsl
+
+## Installation
+

README.md

+# pivtools
+
+MATLAB based 2D and stereo PIV processing, accelerated with C-MEX extensions
+
+# Description
+
+## What is pivtools?
+pivtools is a set of tools for 2D planar and stereo PIV, developed at the University of Southampton by Dr. John Lawson since 2018.
+
+There are many other open source projects which offer similar functionality, as well as commercially available softwares.
+Notable open source examples are [OpenPIV](https://github.com/OpenPIV) and [PIVLab](https://github.com/Shrediquette/PIVlab)
+A curated list of projects is available at the [Awesome Fluid Dynamics list](https://lento234.ch/awesome-fluid-dynamics/#experimental-fluid-dynamics).
+
+## Why use pivtools? 
+
+Currently, the main advantages are
+ * it is fast on CPU-based architectures
+ * it can do stereo PIV
+ * processing can be accelerated easily on cluster computing 
+
+# Prerequisites and dependencies
+
+pivtools is MATLAB based with compiled MEX extensions.
+You will need MATLAB 2022b or later and the following toolboxes:
+ * Image Processing Toolbox
+ * Signal Processing Toolbox
+ * Statistics and Machine Learning Toolbox
+
+Additionally, to build pivtools from source, you will need
+ * [GNU Scientific Library (GSL)](https://www.gnu.org/software/gsl/)
+ * [FFTW3](https://www.fftw.org/)
+
+On Ubuntu, you can install these using
+
+    sudo apt-get install libfftw3-dev libgsl-dev
+
+# Installation
+
+To install pivtools from source, download a copy of the latest version from the pivtools repositroy
+
+    git clone https://git.soton.ac.uk/jml1g18/pivtools.git
+
+pivtools uses compiled MEX functions to accelerate PIV processing.
+To build these, you will first need to [set up MATLAB to compile mex extensions](https://uk.mathworks.com/help/matlab/matlab_external/changing-default-compiler.html)
+You will then need to edit `make.m` to provide the include and library path to GSL and FFTW
+Then, to compile pivtools MEX functions, navigate to your installation directory and run
+
+    make.m
+
+# Usage
+
+TODO: add some examples of usage
+
+# Authors and acknowledgement
+
+Contributors
+
+ * Dr. John Lawson ( jml1g18@soton.ac.uk )
+
+# License
+
+See LICENSE
+
+# Project status
+
+Active as of October 2023