Add svbtle detection (#1847)

* Add svbtle detection

This can be tested on any svbtle blog, likes [this one](https://blog.dijit.sh/).

* Fix some minor issues, courtesy of @gadcam

src/apps.json

@@ -8345,6 +8345,17 @@
 			"script": "supersized(?:\\.([\\d.]*[\\d]))?.*\\.js\\;version:\\1",
 			"website": "http://buildinternet.com/project/supersized"
 		},
+		"Svbtle": {
+			"cats": [
+				"11"
+			],
+			"icon": "svbtle.png",
+			"meta": {
+				"generator": "^Svbtle\\.com$"
+			},
+			"url": "\\.svbtle\\.com",
+			"website": "https://www.svbtle.com"
+		},
 		"SweetAlert": {
 			"cats": [
 				"12"