add hemisphere example + dump/restart in examples + add monitor printing velocity/vorticity profiles

Fix penalisation/subsets (partially)
Update doc (sphinx)
Almost all tests ok except:
	 22 - mpi_test_advec_scales (Failed)
	 77 - test_advection_nullVelocity (Failed)
	 79 - test_advection_randomVelocity (Failed)

beginning of problems fixing in Momentum force computation and vorticity penalization + add absorption at the oulet + update of FlowAroundSphere bench