PLT-358 - Alter LocalDateRange to exclusive end

Alter to be based on exclusive end based on usage experience
PLT-372 - Static inner classes
PLT-372 - Simplify holiday calendar

Remove unecesary methods and coupling
Rename WEEKENDS to SAT_SUN
Javadoc
PLT-372 - Convert holiday calendar to an interface
PLT-372 - Add global calendars
PLT-417 - Basic IO classes

ResourceLocator, IniFile, PropertiesFile, PropertySet
PLT-417 - Basic IO classes
PLT-420 - Extended enum

Mechanism to allow configuration of enum-like objects
PLT-420 - Use extended enum

Setup configuration to use ExtendedEnum
WIP adjustable date