Defined WikiFont characters rather than pasting raw chars.

As Brion pointed out, the raw chars don't render in xCode so
they're hard to read.

The define names I used are based on the names from the names
from the WikiFont repo's font.css file.

Change-Id: Ic7515a61ebdb8bcc4111d18eb9f5118e88dc689c
Merge "Defined WikiFont characters rather than pasting raw chars."