Reorganize the tree for easier and better handling.

- Template helpers have been moved to templates/helpers.
- Documentation to docs/.
- Common scripts have been moved to utils/sh.
- Fixed install-destdir when executed via chroot.
- Added a build-pkg target that builds a binary package.
  The package must be installed into destdir before using.
- Misc tweaks and fixes.

--HG--
extra : convert_revision : 0896e8f24bb7592116aaf77ae9c776033818a3d8

templates/helpers/gtk-update-gdkpixbufloaders.sh

@@ -0,0 +1,17 @@
+#
+# This helper updates GTK's gdk-pixbug.loaders modules file every time
+# a template requests this process.
+#
+gtk_version="2.0"
+gdk_pixbuf_query_cmd=$XBPS_MASTERDIR/bin/gdk-pixbuf-query-loaders
+gdk_pixbuf_db=$XBPS_SYSCONFDIR/gtk-$gtk_version/gdk-pixbuf.loaders
+
+if [ -x $gdk_pixbuf_query_cmd -a -w $gdk_pixbuf_db ]; then
+	$gdk_pixbuf_query_cmd > $gdk_pixbuf_db
+	[ "$?" -eq 0 ] && \
+		echo "=> Updated GTK+ $(basename $gdk_pixbuf_db) modules file."
+fi
+
+unset gtk_version
+unset gdk_pixbuf_query_cmd
+unset gdk_pixbuf_dbfile