How do Mormons interpret the following passage and justify the addition of the Book of Mormon to the canon of scripture?
Revelation 22:18-19 (NIV)
18 I warn everyone who hears the words of the prophecy of this scroll: If anyone adds anything to them, God will add to that person the plagues described in this scroll. 19 And if anyone takes words away from this scroll of prophecy, God will take away from that person any share in the tree of life and in the Holy City, which are described in this scroll.
In my experience, this is in reference to the entire Bible and how we should not add to or remove from it. How is the LDS view on this different?