Revised how temperatures are made dimensionless
Fixed the linear and nonlinear solvers

Both the linear and nonlinear solvers (transient only) had an issue
where they would not properly apply Dirchlet boundary conditions.
due to when the global matricies were modified. This has been fixed.
Finally fixed the heat transfer model

This updates the heat transfer model so that it is actually correct.
The model validates reasonably well against the graphical solutions
in An Introduction to Heat and Mass Transfer by Middleman (for the
case of constant thermal diffusivity and no deformation, at least).