Add a few missing \fn's to BFont docs
BShape: Style fixes for docs
Document BShape and BShapeIterator
BShape: Rename these params back in header.

Accidentally renamed these in the header, rename them back to
match the cpp file. These param names might not be very good but
they match the struct variable names. They are private methods
anyway. No functional change intended in either commit.
Add newline to end of BShape docs