Add dummy application example + fix bugs + add enhancements#37

x-m-el wants to merge 26 commits intomu-semtech:feature/enhance-for-ember-4mu-semtech/ember-data-table:feature/enhance-for-ember-4from

x-m-el:dummy-and-updatesx-m-el/ember-data-table:dummy-and-updatesCopy head branch name to clipboard