Image comparison: disable largeImageThreshold

This "feature" makes the output nearly unusable and ironically
significantly larger (at the benefit of saving ~20% of runtime)

Set the number high enough that we'll never hit it.

Author: danielbeardsley

lib/compareImages.js

@@ -23,7 +23,11 @@ module.exports = function() {
     /**
      * compare images
      */
-    var diff = resemble(this.baselinePath).compareTo(this.regressionPath);
+    var diff = resemble(this.baselinePath)
+    // This feature makes the output nearly worthless and impossible to read.
+    // Set it high enought that we never hit it.
+    .outputOptions({largeImageThreshold:1000000000})
+    .compareTo(this.regressionPath);
 
     /**
      * map 'ignore' configuration to resemble options