Intern:Processing levels

See Processing levels.
 * Processing level is not a mandatory field in the dataset, but should be indicated on whenever it is possible to determine it, according to the PANGAEA scheme.
 * When the submitted data contains several PANGAEA processing levels (e.g. Binary_object) in one submission, then the higher PANGAEA data processing level will be assigned to the dataset or the submission may be split into several datasets.
 * Processing levels are not be assigned to parents. Parents may include data sets with different processing levels.