add instruction for venv setup on TARS

README.md

-Scripts and instructions to run CWL on TARS
\ No newline at end of file
+# Scripts and instructions to run CWL on TARS
+
+## Usage
+
+---------
+
+# Maintenance and Development
+
+## Setting up virtual environment for Toil
+
+28/05/2019: _The following instruction will change when different PR will be merged to the main repositories_
+
+To set up and environment for Toil on Tars, follow the the following instructions:
+
+```bash
+module load Python/3.7.2
+python3 -m venv your-toil-venv
+source your-toil-venv/bin/activate
+(your-toil-venv)$ pip install toil
+(your-toil-venv)$ pip install git+https://github.com/drkennetz/cwltool.git@singularity23_fix  # This will change soon
+(your-toil-venv)$ pip install git+https://github.com/khillion/cwl-utils.git  # This need to change to to be more stable
+```