Lucene.Net.Document.FieldType: Upadated doc comments
Lucene.Net.Document.FieldType: Upadated doc comments

Updated NumericType description to specify NumericType.NONE rather than null.
jeme/lucenenet,apache/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,NightOwl888/lucenenet,apache/lucenenet,NightOwl888/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,apache/lucenenet,apache/lucenenet,jeme/lucenenet