- Added xios_variable as public type (in order to be used by the xios client)

- Added example of getting/setting variable as global/local attribute of field/file in test_complete.
- Some cleaning in test_complete program and xml files.



git-svn-id: http://forge.ipsl.jussieu.fr/ioserver/svn/XIOS/branchs/xios-1.0@529 d613d254-d18a-4304-b296-5125d4c4d670