Added crystal project icons. * artsbuilderexecute.png: Added. * configure.png: Added. * editcopy.png: Added. * editcut.png: Added. * editpaste.png: Added. * filenew.png: Added. * fileopen.png: Added. * filesave.png: Added. * filesaveas.png: Added. * redo.png: Added. * search.png: Added. * undo.png: Added. * up.png: Added. * resource.qrc: New resource file that compiles into the executable. * file-editor.cc: Retrieving new icons from resource file. * main-window.cc: Retrieving new icons from resource file. * src.pro: Added resource file to project.

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