new gui icons for zooming and information dialogs * libgui/src/icons/octave/128x128/dialog-information.png: new file * libgui/src/icons/octave/128x128/view-zoom-in.png: new file * libgui/src/icons/octave/128x128/view-zoom-in.png: new file * libgui/src/icons/octave/128x128/view-zoom-in.png: new file * libgui/src/icons/octave/scalable/dialog-information.svg: new file * libgui/src/icons/octave/scalable/view-zoom-in.svg: new file * libgui/src/icons/octave/scalable/view-zoom-in.svg: new file * libgui/src/icons/octave/scalable/view-zoom-in.svg: new file * libgui/src/module.mk: entries for new icon files * libgui/src/resource.qrc: entries for new icon files

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