terminal: switch to evilvte

With a custom compilation. It supports more stuff than xfce4-terminal,
notably italics. There are still a lot to do to have something as nice
as rxvt... Should be compiled with GTK3, otherwise, it will have the
same problems than xfce4-terminal.

rc/quake.lua

@@ -3,7 +3,7 @@ local quake = loadrc("quake", "vbe/quake")
 local quakeconsole = {}
 for s = 1, screen.count() do
    quakeconsole[s] = quake({ terminal = config.terminal,
-                             argname = "--role %s",
+                             argname = " ",
 			     height = 0.3,
 			     screen = s })
 end