DCR_Pseudo-section_Simulation.ipynb Failing

[lheagy]

The notebook: /em_examples/notebooks/geophysical_surveys/DCR_Pseudo-section_Simulation.ipynb is currently failing. Please see lines 422 and on in the travis log, partially copied below

[lheagy]

tests can be run locally using the command line from the em_examples folder by running

nosetests tests

[dccowan]

I won't be able to merge changes for InductionLoop app functions until this is fixed. Problems in DC_inversion are causing the pull request to fail.