Updated test cases to use Data provided by "testdata.txt" file - retested
to confirm that results were still satisfactory.
Additional comments, added in solution for "isOnlyWhitespace" with
expected (and tested) test results, copied instructions for DOM
part of the test to JsAndDom.html
Include via CDN jQuery. Imported comments for DOM challenge
instructions. This commit includes solutions for utilizing
jQuery-Selectors in multiple ways to find same element along with
comments containing checks to show in console that the proper element
was selected.