20140506 build 6.0 001

Update to ilib build 6.0-001.

* Date objects clean-up
    * All date objects for all calendars are based on a rata die (RD) date t
    * Code is simplified and a little smaller as a result
    * Calculations for the day-of-the-week still occur in local wall time in
* Time zone clean-up
    * Split time zone info into separate files instead of one big one
    * Split the timeszones.json file into a whole bunch of separate zoneinfo
    * Changed the zone info compiler (zic) to write out the separate files
    * Changed the assembly tool to assemble all the zones used for each loca
    * Modified ilib.TimeZone to load in individual zone info files, instead 
    * Created an ilib.Loader interface to be able to get more information ab
    * Modified the node glue file to implement the ilib.Loader interface for
* Added the missing node based build tools to the shipping src tar
* Updated time zone info to IANA 2014b
    
Bug Fixes:
    
    * Fixed a minor problem with time zone abbreviations in Danish, Norwegian, a