SSTMap Improvement

Some notes from meeting with Tobias, the following improvements in the code are planned in the next few weeks:

• Improve overall readability and documentation.

  • Break up complex list comprehensions, especially those that won't affect performance much.
  • More meaningful variable names.
  • Updated docstrings and more comments
  • Make import statements comply with pep8 rules

• Use a quantity-based data structure for gist. Instead of using a big matrix of voxels and quantities, break up the matrix into separate data objects (of same type) for individual quantities.

• Improve plotting functions in utils, return plotting objects upon request.

• Re-factor calculate_grid_quantities() to allow better control over the calculations, such as allowing for variables that stores data for monitoring convergence and give user more control over processing the trajectory.