Work on tests.
Add valgrind assembling test.
Updates of some tests.
Add memory leaks test - spaces.
Add missing file.
Fix leaks in the example itself.
Make test faster.
Add horn Agros-like test.
Fix memory leaks in the test example.
Work on tests.
Add Agros mesh for coupled problems to testing.
Add threading tests.
Fix the DRD calls.
Fix test values.
Fix a value in ns-heat-subdomains.
Add memory leak tests for solvers.
Fix wrt. recent changes.
Fix logfile names on memory leaks tests.
Deallocate sln in solvers' test.
Fix for new devel.