Add annotation set transform framework

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

includes/GlModelTransformOutput.php

@@ -23,6 +23,7 @@ class GlModelTransformOutput extends MediaTransformOutput {
         $this->height = $parameters['height'];
         $this->view = (isset($parameters['view'])) ? $parameters['view'] : 'default';
         $this->hsset = (isset($parameters['hsset'])) ? $parameters['hsset'] : 'all';
+        $this->transform = (isset($parameters['settrans'])) ? preg_split("/[\s,]+/", $parameters['settrans']) : [];
         $this->url = $file->getFullUrl();
         $this->thumb = isset($parameters['isFilePageThumb']) && $parameters['isFilePageThumb'];
 	}
@@ -112,6 +113,15 @@ class GlModelTransformOutput extends MediaTransformOutput {
             } else {
                 $annotations = $metadata['annotations'];
             }
+
+            //Apply any request transformations
+            if ($this->transform) {
+                if (in_array('alpha',$this->transform)) {
+                    ksort($annotations);
+                }
+            } 
+
+            //Create hotspot elements
             foreach($annotations as $label => $an) {
                 $elAnnot = Html::rawElement('div',['class' => 'HotspotAnnotation HiddenAnnotation'],$label);
                 $hsDefault = array(