Upstream hotfixes

Here are my fixes. I've changed some of the couplings, switched to sweeping the axial field, and tried to add the source terms to the KSP Solve. Things still aren't working very well. The below image is the result I currently have. Note that the blue traces are those without a transverse field.

![absorption](https://cloud.githubusercontent.com/assets/6655329/5282003/80cabd84-7ad0-11e4-8fae-14050fc6734f.png)