Archiving!
renamed:    Pandas Column Density.ipynb -> Column Density.ipynb
renamed:    Clusters.ipynb -> archive/Clusters.ipynb
renamed:    Column Density.ipynb -> archive/Column Density.ipynb
renamed:    Density Profile.ipynb -> archive/Density Profile.ipynb
renamed:    Griddata Column Density.ipynb -> archive/Griddata Column Density.ipynb