Change heading structure in HTML output to be more meaningful to screen readers

[davidengebretson]

I think there needs to be more meaningful heading structure in the HTML output to make it simpler to navigate the data that is output while using a screen reader.

1. There could be:
   a. the alt text in question at heading level 2
   b. the number of detected probable errors in the alt text at heading level 3
   c. the line number that the error(s) is found on
   d. The probable spelling errors
   e. then the code detected from the webpage that has probable spelling errors