Mystcraft Reborn

Small feature update that enhances the experience of using books and book bags.

CHANGELOG:

• When hovering over a linking book mounted into a chiseled bookshelf, an inline media preview is now included with the tooltip overlay. It also shows the first line of the book notes area.
• Book bag controls now match the conventions set by my other upcoming mod, NeoTraders. Right-click to move a book bag in your inventory. Left-click to open the book bag in place. The escape key / E key can be used to go back one layer. You can also nest bookbags inside eachother.