Bug 511163 – Remove pango_extents_to_pixels() calls

* gtk/gtkcellrenderertext.c (get_size): Use
        pango_layout_get_pixel_extents.

        * configure.in: Bump Pango requirement to 1.20

        * INSTALL.in: Update required versions


svn path=/trunk/; revision=20171

INSTALL.in

@@ -5,7 +5,7 @@ GTK+ requires the following packages:
 
  - The GLib, Pango, ATK and cairo libraries, available at the same 
    location as GTK+. GTK+ @GTK_VERSION@ requires at least GLib 2.15.0, 
-   Pango 1.19.3, ATK 1.13.0 and cairo 1.6.0.
+   Pango 1.20, ATK 1.13.0 and cairo 1.6.0.
 
  - The TIFF, PNG, and JPEG image loading libraries. You most
    likely have these installed on your system already. If not