BugFix: Cult Ghosts...after a bit of professional advise from chinsky.

Problem:  Cult members can't use the rune to see ghosts, then beat ghosts over the head.  it was being intercepted by _onclick and processed there and only displaying an angry red notice
that you hit that ghost.  Ghost didn't become visible, it disappeared soon after moving off the rune.

Solution:  Made an attackby for ghosts to check when they are being beat up by cultist with books, now they appear.

Minor feature change:  Now if a visible ghost gets hit it will give a different message than the standard "Ghost is pulled through from the other side".
Merge pull request #3923 from Ccomp5950/master

BugFix: Cult Ghosts...after a bit of professional advise from Chinsky.