modify rotation of image

Author: nicolocarpignoli

src/modules/marker/templates/pattern.image.handlebars

@@ -30,6 +30,7 @@
                     src="{{assetPath}}"
                     scale="{{assetParam.scale}} {{assetParam.scale}} {{assetParam.scale}}"
                     class="clickable"
+                    rotation="-90 0 0"
                     gesture-handler
                 ></a-image>
             </a-marker>