GPUE functionality

GPUE is a general-purpose BEC simulator and can be used for a number of different superfluid simulations. The basic usage of GPUE will be described here, including:

  1. Basic usage of GPUE for 1, 2, and 3 dimensional simulations
  2. Gauge fields in 2 and 3 dimensions
  3. Vortex tracking in 2 dimensions
  4. Dynamic fields and equation parsing