fix messages in the console and other changes

Author: kalwalt

example/demo.html

@@ -14,32 +14,32 @@ <h1>FeatureSET-Display</h1>
         <p>Displaying .iset .fset .fset3 files</p>
         <p>Feature points: light green circles</p>
         <p>FeatureSet3 points: tiny red circles</p>
-        <input type="file" id="imageLoader" name="imageLoader" style="display: none;" multiple />
-        <button class="bt" id="uploadBt" onclick="document.getElementById('imageLoader').click();">Upload Image</button>
+        <input type="file" id="markerLoader" name="markerLoader" style="display: none;" multiple />
+        <button class="bt" id="uploadBt" onclick="document.getElementById('markerLoader').click();">Upload NFT marker</button>
     </div>
 
     <script type="text/javascript" src="../dist/ARFset.js"></script>
 
     <script>
         var ar = new ARFset.ARFset();
-        var imageLoader = document.getElementById('imageLoader');
-        imageLoader.addEventListener('change', handleImage, false);
+        var markerLoader = document.getElementById('markerLoader');
+        markerLoader.addEventListener('change', handleImage, false);
 
         function handleImage(e) {
             nameWithExt = e.target.files[0].name;
             if (e.target.files.length == 3) {
-                console.log("Image uploaded: " + nameWithExt);
+                console.log("NFT marker uploaded: " + nameWithExt);
 
                 name = nameWithExt.substr(0, nameWithExt.lastIndexOf('.'));
 
                 let ext = nameWithExt.substr(nameWithExt.lastIndexOf('.'));
 
                 if (ext == '.iset' || ext == '.fset' || ext == '.fset3') {
-                    console.log('featureSet detected!');
+                    console.log('FeatureSet detected!');
                     fileReader(e)
                 }
                 else {
-                    console.log("Invalid image format!");
+                    console.log("Invalid file format!");
                 }
             }
         }