Added Lightbox detection

Lightbox is also used by various CMS like vBulletin to display images, as far as I know.
http://lokeshdhakar.com/projects/lightbox2/
https://en.wikipedia.org/wiki/Lightbox_%28JavaScript%29

share/apps.json

@@ -1483,6 +1483,12 @@
 			"headers": { "X-Lift-Version": "(.+)\\;version:\\1" },
 			"implies": "Scala"
 		},
+		"Lightbox": {
+			"website": "http://lokeshdhakar.com/projects/lightbox2/",
+			"cats": [ 26 ],
+			"script": "lightbox.*\\.js",
+			"html": "<link.+?href=\"[^\"]+lightbox(\\.min)?\\.css",
+		},
 		"LightMon Engine": {
 			"website": "en.lightmon.ru",
 			"cats": [ 1 ],