TemporalAdjusters and TemporalQueries

The static methods on TemporalAdjuster and TemporalQuery feel slightly misplaced after using them for a few months. While they make discovery easier, they add significant weight to the basic interface. Using separate static classes for methods which are an extensible set feels more appropriate now.

Recreating public TemporalAdjusters and TemporalQueries classes is relatively easy, as they are already package scoped.

See JSR 310 issue: https://github.com/ThreeTen/threeten/issues/340