Runner use central dataset

Pacemaker - remove pyiron_gpl from requirements

Place database inside resources 

Final changes: All types of potentials are now included in the validation notebooks! Hope this works!

Updated final notebook, included RuNNerFit.ipynb to Workflow-RuNNer.i…

Updates

remove ace potential validation; add E-V curve only

Update pyiron_contrib 0.0.8

# Conflicts:
#	resources/lammps/potentials/potentials_lammps.csv

Remove old RuNNer potential