First release of full-Stokes grounding line dynamics solver

FEniCS code developed for a manuscript describing a numerical method for full-Stokes grounding line dynamics in the subglacial lake and ice-ocean settings:

A.G. Stubblefield, M. Spiegelman, and T.T. Creyts, "Variational formulation of marine ice sheet and subglacial lake grounding line dynamics", submitted to Journal of Fluid Mechanics (2020).