ex2a: Laplacian working; added define for all operators
ex2a: Laplacian working; added define for all operators

saikanth88/femus,FeMTTU/femus,FeMTTU/femus,FeMTTU/femus,giorgiobornia/femus,giorgiobornia/femus,saikanth88/femus,saikanth88/femus,giorgiobornia/femus,saikanth88/femus,giorgiobornia/femus,FeMTTU/femus