fix examples times_of_interest, fix graph builder io_params, fix useless folder generation, fix argparser io_parms, add hdf5_disable_slicing, set io_params=False by default

Move back example interface outside hysop package (environment configuration by the interface without importing hysop)

safer --clean for examples, now prompts the user to confirm action. Added no interactive option to force cleaning.

dump_dir rank appending is now disabled by default. Use p{rank} in the example interface to enable it again.