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Removed old undefined symbols to fix build error on windows
	glade_app_get_plugins_dir()
	glade_catalog_supports_libglade()
	glade_catalog_supports_gtkbuilder()
	glade_signal_editor_construct_signals_list()

Fixes bug #675977 "Don't hard-code library search paths"

gtk_builder_add_from_resource()

Set save=false to every GtkActivatable properties since they are always saved in glade_gtk_widget_write_widget()

Fixes bug 588981 "Catalog support in GUI preferences instead of using environment var"

Made glade_app_get_config() returna  static pointer so that it can be used before creating a GladeApp

to get the placeholder window from the pointer.
Use glade_util_get_placeholder_from_pointer() in paste action activate

Fixed a bug while #675395 "Using right click to add a widget over a placeholder do not work as expected every time"
By using the placeholder that got the right click on the paste command.

Removed use of deprecated function gtk_widget_get_pointer()

"plugins/gtk+.xml.in: always store GtkButton [x|y]align properties"

src/glade-window.c:
 Use GtkBuilder and GResources to build GladeWindow contents
 Implemented menu with GtkActions
 Push tooltip for rencet manager and project actions

src/main.c: Register glade GResources

src/glade-resources.gresources.xml: Glade Gresource file

src/glade.glade: Glade UI GladeWindow, about and preferences dialog

src/glade-callbacks.h: callbacks declarations

src/Makefile.am: added glade-resource.c to source list

configure.ac:
 bumped version to 3.13
 added glib-compile-resources path program

glade-rules.mk: added common rules for GResources files