fix typo: "hight" --> "high" (#45)

* fix typo: "hight" --> "high"
#44 (comment)

* replace references to images hosted on "thewebhatesme.com" with local images in template files

module/VisualCeption.php

@@ -197,7 +197,7 @@ private function createImageDeviationException($identifier, $compareScreenshotPa
         if ($seeChanges) {
             $message = "The deviation of the taken screenshot is too low";
         } else {
-            $message = "The deviation of the taken screenshot is too hight";
+            $message = "The deviation of the taken screenshot is too high";
         }
 
         $message .=  " (" . $deviation . "%).\nSee $compareScreenshotPath for a deviation screenshot.";