added fux on the left face in tutorial ex10
added fux on the left face in tutorial ex10

FeMTTU/femus,eaulisa/MyFEMuS,saikanth88/femus,saikanth88/femus,saikanth88/femus,eaulisa/MyFEMuS,FeMTTU/femus,saikanth88/femus,giorgiobornia/femus,giorgiobornia/femus,FeMTTU/femus,giorgiobornia/femus,eaulisa/MyFEMuS,FeMTTU/femus,giorgiobornia/femus