don't build the mozilla plugin on mac, it breaks the build, and is already included in the bundled gst, also add copyright date
add apple-remote extension from mac-remote-control
add apple-mediakeys extension from whitedragon
build apple-* extensions on darwin
remove 'debouncing' requiring the button to be pressed twice
install apple-* extensions, since they're darwin only
Merge pull request #284 from johnmurrayvi/mac-sb-trunk-oldxul

Add apple/mac specific extensions to the build tree