* configure.ac, NEWS: Rolling 3.13.0, bumped gtk dependency to 3.4

2012-05-04  Juan Pablo Ugarte <juanpablougarte@gmail.com>

        * gladeui/glade-app.c: Added glade_init()
          Made glade_app_get_config() return a  static pointer so that it can be
          used before creating a GladeApp

        * src/Makefile.am, src/glade-preferences.[ch], src/glade-window.c, src/glade.glade:
          Implemented GladePreferences dialog.
          Fixes bug 588981 "Catalog support in GUI preferences instead of using environment var"