added .DS_Store and .ipynb_checkpoints to the gitignore
added .DS_Store and .ipynb_checkpoints to the gitignore

wizmer/NeuroM,mgeplf/NeuroM,liesbethvanherpe/NeuroM,BlueBrain/NeuroM,juanchopanza/NeuroM,eleftherioszisis/NeuroM,lidakanari/NeuroM