Added upgrade commands for pip and setup tools to README.md. Old setup tools...

Added upgrade commands for pip and setup tools to README.md. Old setup tools caused problems on some installations.

README.md

@@ -22,6 +22,8 @@ Clone and install the nomad infrastructure and the necessary dependencies (inclu
 git clone https://gitlab.mpcdf.mpg.de/nomad-lab/nomad-FAIR nomad
 cd nomad
 git submodule update --init
+pip install --upgrade pip
+pip install --upgrade setuptools
 pip install -r requirements.txt
 ./dependencies.sh -e
 pip install -e .