Update readme

README.md

@@ -17,6 +17,30 @@ pip install -e .
 The plugin should then be available for use in your Python environment as
 `prototorch.models`.
 
+## Development setup
+
+It is recommended that you use a virtual environment for development. If you do
+not use `conda`, the easiest way to work with virtual environments is by using
+[virtualenvwrapper](https://virtualenvwrapper.readthedocs.io/en/latest/). Once
+you've installed it with `pip install virtualenvwrapper`, you can do the
+following:
+
+```sh
+export WORKON_HOME=~/pyenvs
+mkdir -p $WORKON_HOME
+source /usr/local/bin/virtualenvwrapper.sh  # might be different
+# source ~/.local/bin/virtualenvwrapper.sh
+mkvirtualenv pt
+workon pt
+git clone git@github.com:si-cim/prototorch_models.git
+cd prototorch_models
+git checkout dev
+pip install -e .[all]  # \[all\] if you are using zsh
+```
+
+To assist in the development process, you may also find it useful to install
+`yapf`, `isort` and `autoflake`. You can install them easily with `pip`.
+
 ## Available models
 
 - [X] GLVQ