added .gitignore and initial string study

Hi BP, I wanted to commit, but also ask you about the div I create in my new file strings.html  After the user types an input and clicks the submit button, my .addListenerEvent is supposed to the string to the console and then attach then new string to the page.  Instead of viewing the string, the page writes: [object HTMLInputElement]

div.value or div.innerHTML do not acheive this either.

Thank you,
Chris