Added better handling of failures loading icons, as Cairo generated exception were crashing app under windows. Minor fix to handling missing processing params to not alter the global defaults.

tools/osx/start

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+CWD=`dirname "$0"`
+echo $CWD
+
+export DYLD_LIBRARY_PATH="${CWD}/lib:$DYLD_LIBRARY_PATH"
+export GTK_DATA_PREFIX="${CWD}"
+export GTK_DATA_DIRS="${CWD}"
+export GTK_EXE_PREFIX="${CWD}"
+export GTK_PATH="${CWD}"
+
+export GTK2_RC_FILES="${CWD}/etc/gtk-2.0/gtkrc"
+export GTK_IM_MODULE_FILE="${CWD}/gtk-2.0/gtk.immodules"
+export GDK_PIXBUF_MODULE_FILE="${CWD}/etc/gtk-2.0/gdk-pixbuf.loaders"
+export PANGO_RC_FILE="${CWD}/etc/pango/pangorc"
+
+cp "${CWD}/etc/pango/pango.modules" /tmp/rt_pango.modules
+
+"${CWD}/rt" 
+