refactor.

src/main/resources/eu/simstadt/regionchooser/website/script/utils.js

-var utils = {
-	groupBy : function(xs, key) {
+var utils = {};
+
+utils.groupBy = function(xs, key) {
 	return xs.reduce(function(rv, x) {
 	(rv[x[key]] = rv[x[key]] || []).push(x);
 	return rv;
 	}, {});
-	},
+}
 	
-	// Copies a string to the clipboard. Must be called from within an
-	// event handler such as click. May return false if it failed, but
-	// this is not always possible. Browser support for Chrome 43+,
-	// Firefox 42+, Safari 10+, Edge and Internet Explorer 10+.
-	// Internet Explorer: The clipboard feature may be disabled by
-	// an administrator. By default a prompt is shown the first
-	// time the clipboard is used (per session).
-	// https://stackoverflow.com/a/33928558/6419007
-	copyToClipboard : function(text, log) {
+// Copies a string to the clipboard. Must be called from within an
+// event handler such as click. May return false if it failed, but
+// this is not always possible. Browser support for Chrome 43+,
+// Firefox 42+, Safari 10+, Edge and Internet Explorer 10+.
+// Internet Explorer: The clipboard feature may be disabled by
+// an administrator. By default a prompt is shown the first
+// time the clipboard is used (per session).
+// https://stackoverflow.com/a/33928558/6419007
+utils.copyToClipboard = function(text, log) {
 	if (window.clipboardData && window.clipboardData.setData) {
 		// Internet Explorer-specific code path to prevent textarea being shown while dialog is visible.
 		return window.clipboardData.setData("Text", text);
@@ -38,18 +39,18 @@ var utils = {
 			document.body.removeChild(textarea);
 		}
 	}
-	},
+}
 	
-	read_kml: function(url){
+utils.read_kml = function(url){
 	return new ol.source.KML({
 		projection : ol.proj.get('EPSG:3857'),
 		url : url,
 		extractAttributes : false,
 		extractStyles : false
 	});
-	},
+}
 	
-	polygon_style: function(color, alpha) {
+utils.polygon_style = function(color, alpha) {
 	return new ol.style.Style({
 		fill : new ol.style.Fill({
 			color : 'rgba(255, 255, 255,' + alpha + ')'
@@ -60,5 +61,4 @@ var utils = {
 			lineDash : [ 5, 10 ]
 		}),
 	});
-	}
-};
\ No newline at end of file
+}