Function discrete alloc sp

Another simple version of the https://github.com/ObjectVision/GeoDMS/wiki/Allocation-functions This function allows for the specification of a partitioning for which the minimum and maximum claims are specified.

It arguments are:

• TypeNames: (LUT: Uint8)->ItemName, LandUnitDomain,
• *SuitabilityMaps: for each TypeNames { LandUnitDomain->Int32 },
• *Regions: UInt16 domain,
• *RegionMap: LandUnitDomain->Regions,
• *MinClaims: for each TypeNames { Regions -> UInt32 },
• *MaxClaims: for each TypeNames { Regions -> UInt32 },
• *Threshold: ->Int32)