This is in anticipation of removing the Point type entirely. Instead, we will
use the fixed.Point26_6 type from golang.org/x/image/math/fixed.

This code dates from before Go 1.0.

LGTM=crawshaw
R=crawshaw
CC=golang-codereviews
https://codereview.appspot.com/206860043

Fix bug where the String representation of a Fix32 representing minus
one quarter was "0:064" instead of "-0:064".

R=r, rsc, rog, nigeltao_gnome
CC=golang-dev
http://codereview.appspot.com/2275043

R=r
CC=golang-dev
http://codereview.appspot.com/2116046

just version 2. The FTL (Freetype Licence) is still available. This
matches the original Freetype library (written in C).

This only expands and does not further restrict the licensing options
available to users of the freetype-go library.

R=adg
CC=golang-dev
http://codereview.appspot.com/1731049

R=adg
CC=golang-dev, rog
http://codereview.appspot.com/1711048

R=rsc
CC=golang-dev, rog
http://codereview.appspot.com/1686048

R=r, rsc
CC=golang-dev, rog
http://codereview.appspot.com/1746043

It still isn't perfect (e.g. it doesn't join), but it's getting closer.

Also fix the bug where RotateCW and RotateCCW was mixed up, since the
Y-axis grows down in a computer graphics co-ordinate system, not up as
in classical mathematics.

R=r, rsc, rog
CC=golang-dev
http://codereview.appspot.com/1736043

The stroking algorithm is a placeholder. A proper one will land in a
future change once the API is agreed upon.

R=r, rsc
CC=golang-dev, rog
http://codereview.appspot.com/1708045