* Add new exercise Variable Length Quantity

* Fix test file

* Get rid of unchecked/unsafe operations warning

* Fix typo in config.json

* Add List imoprt to starter solution

* Break up some tests into multiple lines

* Throw an IllegalArgumentException in error cases.

* Add more topics

* Indent multi-line arguments

* Implement Zipper

* Update config

* Update readme

* Minor changes

* Update all methods to package private

* word-search: update test suite to 1.1.0

* word-search: import Ignore

* word-search: remove duplicated test