Installation Instructions in Readme out of date

[rossfu7]

Attempted to install on new computer and kept running into "torch_cluster not found" issues.

The below instructions appear out of date:

# install requirements
conda install -y pytorch pytorch-cuda=12.1 -c pytorch -c nvidia 
conda install -y -c pyg pytorch-cluster
conda install -y -c conda-forge openbabel ase
## pysis requirements
conda install -y -c conda-forge autograd dask distributed h5py fabric jinja2 joblib matplotlib numpy natsort psutil pyyaml rmsd scipy sympy scikit-learn
# now should not do any pip installs
pip install git+https://github.com/eljost/pysisyphus.git
# finally, this repo
git clone git@github.com:zubatyuk/aimnet2calc.git
cd aimnet2calc
python setup.py install

Recommendations:

1. Replace conda install -y pytorch pytorch-cuda=12.1 -c pytorch -c nvidia and conda install -y -c pyg pytorch-cluster with text to follow the official installation instructions on the pytorch and pyg websites. A later version of cuda (I had 13.0) still works.
2. Replace git clone git@github.com:zubatyuk/aimnet2calc.git with instructions to clone the official repository