The ability to add by weekdays so that user can easily get the next/previous X weekdays
Added isWeekend method
Added some comments to clarify the workweek weekend definition.
minor reformat to use 4 space indentation
Merge branch 'master' of https://github.com/JerrySievert/node-date-utils
fix merge conflicts
Merge branch 'kailuowang-master'
more merge fixes
bump version