Made search more efficient and tweaked weighting

Added per-entity weighting changes.
Now Books score higher than chapters which score higher than pages.

Reduced queries required on search by only searching once but at a
higher count to see if there's another page.

app/Book.php

@@ -2,6 +2,7 @@
 
 class Book extends Entity
 {
+    public $searchFactor = 2;
 
     protected $fillable = ['name', 'description', 'image_id'];