Add Dutch participle exceptions

[agnieszkaszuba]

We should make sure that the correct participle forms are created for exception verbs. This includes two components:

1. Make sure that the correct participle forms are created for words that are on lists of strong and irregular verbs (e.g., zitten -> gezeten).
2. Make sure that if the participle is an exception in two ways (strong/irregular verb + a participle-related exception, for example an exception to the rules for creating participles of compound verbs), it also gets the correct forms. (e.g., doorsnijden -> doorsneden OR doorgesneden)