Changed Demographic Summary bullets per Alyson's suggestions

Edited the part about female students in 112 and 243.
I started working on the wrong version, but this should be the right one.

If I couldn't figure out how to fix, I left a comment. Search for CV to
find my comments.
one more minor change
Let's try this one more time

I'm trying to commit all my changes.
Merge pull request #109 from CVollet/master

I think this fixes most of Section 4.