refs #97: Added the tests.
refs #97: Handle faked super/sub script tags in the simplest.
refs #97: Only deal with faking sup and sub tags if the size if smaller.
refs #97: Hopefully that fixes 2.7 and 3.3
refs #97: Update note.
refs #97: Oops, fixed function name.
refs #97: This solution should address all concerns from the review.
Merge pull request #97 from CenterForOpenScience/issue_97

Handle faked super and sub script tags