Wrapped two new NDE2 calls, and created required datatypes.

Calls: GetSubjectDetail, GetDatasets
Types: DetailedSubject (→ Subject), DateRange, DataSetFamily

Change-Id: I52f9f6e2c69027ccceb082c6a8efc9c3e6970184
Signed-off-by: Filip Wieland <filiplamparski@gmail.com>
Merge branch 'master' of https://github.com/FLamparski/areabase.git