Change gradient characters of 'large' textscreen font to be direct
scale-ups of the standard res versions of the characters: in addition to
giving a more 'authentic' retro look, this fixes a problem where the
high-frequency dot patterns can cause weird moire effects on some
monitors.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 2735
Change old Doom wiki link to new URL (thanks Quasar).

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 2740