* grep: WIP add exercise * grep: implement exercise * grep: add to config.json * grep: update config.json and add hints * grep: Add .keep file * grep: improve reference solution * grep: Make sure settings.gradle is in alphabetical order
* 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