add: direct support for float values
add: direct support for float and int values
chg: refactoring of integer and float handling
CHG: cs:float mapped to BigDecimal in order to keep information about
scale and precission
add: introduced explicit subclasses for feature-value-types
chg: adjusted to support explicit sub-types of feature-values
del: removed footer
fix: level of concepts
add: optional scale and rounding for float-values
add: optional scale and rounding for float-feature-values
fix: mathematical operations on datalayer not interface objects!
add: configuration settings for float-values and value-ranges
add: introduced settings via constructor
chg: validators and resolvers are extractable and configurable
add: introduced Prediction-Request
add: support for prediction-service
fix: feature-events must look into concepts and choices
add: introduced new RelationHelper
add: isCompatible() for mix of Feature and Value
add: check compatibility of relation parameters
refactoring: moved helper functions to RelationHelper class