#6 Updated XFT support

[Campbell Barton]

This patch adds XFT support.

Based on this patch:
https://aur.archlinux.org/packages/notion-xft/

With following changes
- Fixed incorrect use of XftColorAllocName, replaced with XftColorAllocValue
- use HAVE_X11_XFT define, not XFT
- wasn't linking correctly for me, had to change makefiles.
- PIXEL macro allowed strange usage.
- conform to Notion's style.

[Campbell Barton]

Note: this is based on https://sourceforge.net/p/notion/feature-requests/47/

Same patch as aur.archlinux.org, but a better source.