"create symbolic link" needs elevation or setting privilege about creating symbolic link

I already initiated discussion thread. Please refer here.
http://mail-archives.apache.org/mod_mbox/storm-dev/201603.mbox/%3CCAF5108hVJpeZbC+JngcQmvE9HmV8HejsZ=cO1gdK3JDirumNmg@mail.gmail.com%3E

This PR is for tracking and resolving symlink issue after discussion.

While it's just initiated, but IMO, at least "how to resolve privilege issue manually" should be documented since privilege issue on Windows users is introduced to Storm 1.0.0 for the first time.