more testing

I re-wrote the function and finally got the unit test working for the open file from url function. I was really pleased with getting everything to work. It got me thinking that I should run tests on the html and javascripts. I was researching web browser tests and might try to install the wptrunner test suite. I also made adjustments to the api documentation. My current priority is to get the javascript/jquery to pop up an input for url. The main author had initially wanted to use the textbox for the url input, but he decided that a separate input would be better than overloading the textbox.