gtksourceview branched for 2.18

[Steve Frécinaux <nudrema gmail com>]

Hello,

I've branched gtksourceview for Gnome 2.18 (the branch gnome-2-18).

New development will happen in trunk. Those developments include the
merge of the SoC 2006 work and will lead to gtksourceview 2.0, featuring
(among others) a new syntax highlighting engine and a themeing support.
This will lead to API/ABI incompatibilities.

gtksourceview 1 now lives on its own branch: gtksourceview-1-8. Use this
one if you want to compile existing apps like gedit and others.