Replace OSX launcher with a native-code version.

- Binary files hosted externally.
- Fixes dialogs hijacking Finder.
- Fixes dock icon being lost when restarting.
- Adds openra:// url handling.
- Adds .orarep file handling.
- Minimum OS X version is now 10.6.

packaging/package-all.sh

@@ -95,7 +95,7 @@ fi
 
 pushd osx
 echo "Zipping OS X package"
-bash buildpackage.sh "$TAG" "$BUILTDIR" "${SRCDIR}/thirdparty/osx" "$OUTPUTDIR"
+bash buildpackage.sh "$TAG" "$BUILTDIR" "$OUTPUTDIR"
 if [ $? -ne 0 ]; then
     echo "OS X package build failed."
 fi