pygraphviz installation clean up

[brando90]

goal is that installing pygraphviz is not an issue and that it works with pip install -e ..
Seems that for now using conda install -y -c conda-forge pygraphviz works if issues arise or if graphviz is installed in the system.

ref: https://stackoverflow.com/questions/67509980/how-does-one-install-pygraphviz-on-a-hpc-cluster-without-errors-even-when-graphv

[brando90]

Due to a depedency on pygraphviz you will likely need to install graphviz first. Next, install graphviz. On mac, brew install graphviz. On Ubuntu, sudo apt install graphviz. After graphviz is install, install uutils in edibable mode and all it's depedencies with pip:

pip install -e ~/ultimate-utils/ultimate-utils-proj-src