Added the alpha disk notes to gitignore. Added a buoyancy term to the EMF plus various bug fixes to its related functions. Fixed a bug for calculating the large scale of the Current Helicity, should be <J dot B> since Hc - hc *does* not equal <J dot B>. In response to discussion with Ethan, the EMF term when looking at the y components should also be the y component: <v x b>_y B_y - EMF_buoy.
Made slight change to the way the global restivity function was being handled. It works correctly now, but gives a warning...not sure why.