add interface templates for HaralickOps
add interface templates for GeometricStatOps
add interface templates for FirstOrderStatOps
add interface templates for FirstOrderStatIRTOps

Interfaces marking of FirstOrderStatistics as OutputFunctions from
Iterableto RealType
add interface templates for HaralickFeatures

interfaces for implementations of HaralickOps as Features
add interface templates for GeometricFeatures

interfaces for implementations of GeometricStatOps as Features
add interface templates for FirstOrderFeatures

interfaces for implementations of FirstOrderStatOps as Features
(WIP)