Restructured the calendar widget to use the new approach to declaring features of a class.
Added unit tests for the Uize.isArguments method.
Improved the implementation of the Uize.forEach method. Updated the docs for the Uize.forEach method to reflect the new support for iterating over the arguments of an arguments object, as well as to better document the different types of sources that are supported. Created a news announcement for the Uize.isArguments method, and updated the news announcements TO DO doc to reflect stuff that's been done.
Updated this example to use the new V2 calendar widget.