Thesis submission

* Fixes bug in deposition type related fields: it was hiding all the fields which are exclusive to some deposition types, it should only hide the ones which are not related to the selected type.

* Adds Thesis date to form.

* Adds degree types knowledge base.

* Adds license field to form.

* Adds thesis date in 502__b and defense date in 269__c.

* Subject term field fix.
No, this would be an imported field from arXiv, I'm giving preference to the user inputed license so if it's filled it ignores the arXiv one; otherwise it's mapped from the licenses kb (both the name and the url).