#255 several sources does not combine with constants and expressions
#255 avoid empty if check due to the introduction of constants in bean mapping
#255 adding unit test for existing mapping target
#145 extended build-in test for calendar<>date and calendar<>string conversion. No need to do anything as existing build-in methods do the trick
#121 support for converting java 8 dates and times to calendar and date
#121 remove redundand JavaTimeConstants type
#121 adjust formatting of builtin methods
#275 do not register Java 8 Date/Time built-in methods if the types are not available
#205 Use autoboxing iso type conversion when possible
#3 and #4 automatically generated iterable- and map-mappings