Add fetch() callback from queryStoreAndInitItems().
Intended for classes like Pageable that want to process the collection bit-by-bit
(one range() at a time) rather than processing the whole thing at once.

Fixes #174.
more jsdoc fixes
fix missing closing <ul> tag in doc
fix typo in comment
Change upon jsdoc-amddcl/pull/23.
Cleanup Grunt config for jsdoc.
remove scrollOnFocus flag, refs #177
JSDoc: remove @summary/description (and a few other minor doc improvements)