Add report writing class

[mdforbes500]

Might save me some personal work in the future and will clean up the code from all of the console messages that are put out. Instead we can get it to drop the initial mesh, the sparsity pattern, the console messages, and the results all in a markdown (.md) report that is formatted for human readers.

[mdforbes500]

Added some input/output file directories. Separates the solution to a resources folder as well as the grid file for the report. Next is the sparsity pattern. Then I'll switch from vtk files to something I can view and validate the solution.

[mdforbes500]

Boom! Sparsity pattern written as an SVG. Now if only I could open VTK files, then I'd have all the graphics I need for the report writing.

[mdforbes500]

Alright, now it outputs a solution in eps format. Looking good. I'll get this to slot into a report later, but this is a good step.