Work on Picard & related.
Small fix.
Re-organize hermes common, especially Algebra code, plus add templates to dense matrix operations.
Fixes in Picard.
Adjust Picard's convergence condition. Works.
Refactor of Nonlinear, Newton, and Picard solvers -> unify convergence measurement and utilities.
gcc fix.
A fix in a test example.
Gcc fix.
A fix of include.
Installation of new directories.
Handle includes.
Installation handling.