Changeset 542 for XIOS/trunk/inputs/Version2

Modifying some codes to compromise with the new type of xios and do some final tests

+) Use new stricter type bool
+) Change set_timestep to set_context_attr

Test
+) On Curie
+) test_client and test_complete passed
+) test with LMDZ passed

TODO: It seems the bug of undefined referenced object has gone but there's a need of more tests