Implement calculate_residual_norm() in Picard.
Fix damping condition in Picard for first iteration.
Work on Picard, use the correct Jacobian in residual calculation.
Fix small memory leaks.
Update README.
Make PARALUTION change its number of threads when the glogal one is changed.
Add Geom to UExtFunction.
Adjust a test example.
Simplify exceptions constructors.
Change NonlinearMatrixSolver verbose output.
A fix in PARALUTION threads initialization.
Implement IntegralCalculator.
Fix gcc build.
Fixes in Integral calculation.
Fix integration calculation.
Gcc fix.
More gcc fix.
Update UExtFunction.
Order of exact solutions.
Fixes.