* packaging/macosx/ScriptExec/main.c: Update ScriptExec with upstream fixes

 *  packaging/macosx/ScriptExec/main.c: Update ScriptExec with upstream fixes
    and changes.  X11.app now gets focus if the Inkscape icon is clicked while
    Inkscape is already open (previously nothing happened).

 *  packaging/macosx/Resources/openDoc: If Inkscape.app is already open and
    a file is dropped on the Inkscape dock icon, or an Inkscape file is
    double-clicked in the Finder, that document will now be correctly opened
    in a new Inkscape window (previously nothing happened).

 *  packaging/macosx/Resources/script: Some minor fixes, plus alert the user
    about the font cache building time only if ~/.fontconfig/ doesn't exist.

 *  packaging/macosx/Resources/bin/inkscape: Only override the fontconfig
    configuration on OSX 10.4 or earlier, since the fc-cache behaviour has
    been corrected on 10.5.

 *  Info.plist.in: Update the copyright dates, and change Inkscape to be an
    Editor for SVG files, rather than a Viewer as it was previously.