Make heat demo init files more consistent.

demo/init/heat.dat.2d

@@ -4,15 +4,14 @@ heatMesh->macro file name:            ./macro/macro.stand.2d
 heatMesh->global refinements:         0
 
 heat->space->polynomial degree:       1
-
 heat->space->dim:                     2
 heat->space->mesh:                    heatMesh
 
-heat->space->solver:                  cg
+heat->space->solver:                  umfpack
 heat->space->solver->max iteration:   1000
 heat->space->solver->tolerance:       1.e-8
 heat->space->solver->info:            2
-heat->space->solver->left precon:     diag
+heat->space->solver->left precon:     no
 heat->space->solver->right precon:    no
 
 heat->space->estimator:              residual

demo/init/heat.dat.3d

@@ -4,14 +4,14 @@ heatMesh->macro file name:            ./macro/macro.stand.3d
 heatMesh->global refinements:         3
 
 heat->space->polynomial degree:       2
-
+heat->space->dim:                     3
 heat->space->mesh:                    heatMesh
 
-heat->space->solver:                  cg
+heat->space->solver:                  umfpack
 heat->space->solver->max iteration:   1000
 heat->space->solver->tolerance:       1.e-8
 heat->space->solver->info:            2
-heat->space->solver->left precon:     diag
+heat->space->solver->left precon:     no
 heat->space->solver->right precon:    no
 
 heat->space->estimator:               residual
@@ -34,7 +34,6 @@ heat->initial->adapt->strategy:      2    % 0=none, 1=GR, 2=MS, 3=ES, 4=GERS
 heat->initial->adapt->max iteration: 10
 heat->initial->adapt->info:          2
 
-heat->space->dim:                    3
 heat->adapt->strategy:        3    % 0=none, 1=GR, 2=MS, 3=ES, 4=GERS
 heat->adapt->ESTheta:        0.9
 heat->adapt->ESThetaC:      0.05