Update Windows packaging to support Open With... on files #133

For legacy reasons, the Windows installer with bundled JDK sets the --jdkhome location via the shortcut. This does not work when used with Open With... on a file, and is susceptible to other issues. Using the launcher directly will either use a system installed JDK or fail to launch at all.

Related issue / discussion thread (amongst others) at apache/netbeans#9378

With changes in the launcher in apache/netbeans#8408 it should now be possible to specify a relative link in the netbeans.conf file using BASEDIR. This will require testing with IDE and platform. Thought should be given whether to keep the shortcut support for packaging older versions, and also whether to filter out the 32-bit launcher from the installed files.