Change the template for Geophysics
Added ignore file
Added notebook with spherical shell analysis
Updated ignore file
Slight edit in notebook
Remaking the analysis notebook

Using pandas for handling the data.
Better flow to build a DataFrame
Calculated differences for Tesseroids

Use IPython.parallel and pandas for data manipulation.
Saved results in CSV and pickle files.
Ignoring tmp files from computations
Removed size 40 and inserted size 0.1

Still need to run the notebook and update the data. Also better save in
CSV format.
Updated calculations and data

Include size 0.1 and saved better CSV
Removed old md text and made figure for sph shell
Merge pull request #1 from pinga-lab/geophysics

Geophysics