lint: tabs->spaces and jQuery->$ for exercises
change less than to <
<s and things
Content-Type meta tag for libxml2 compatibility
TeX the <, >, = in inequality exercises
Small spacing correction in comparing_fractions_1.html
Corrected spacing in comparing fractions exercises and removed .gitig…
Add meta charset to all HTML pages.
Fix errors with spelling and grammar. Also changed the test mode cond…
…itional to allow "127.0.0.1".
Test plan: Try out each exercise that I have modified, while using hints.
Make MathJax pretty! (fix #212)
Rename EVERYTHING; closes #323.
graphie for comparing_fractions_1
Two graph divs instead of one
Add a pie to comparing fractions
Add exercise -- comparing fractions 1