Implement hermit-unlink

hermit-unlink now deletes all symbolic links that connect to $HERMIT_PROFILE.. i think.
I'm not a huge fan of this idiom of piping the output to a loop and reading it with `read`...  But I don't have any good reasons to dislike it.  In fact, it occurs to me that this might actually facilitate process pipelining by allowing find to incrementally feed it's results to the loop...

Is there any reading that you have found about the use of this paradigm? I'd be interested to see what more sophisticated persons than I think about it :)