turtle support added

A web development oriented editor should support RDF and hence Turtle as the broadly used and most human-readable RDF format.

Author: bozicb

src/language/languages.json

@@ -293,5 +293,12 @@
         "fileExtensions": ["hs"],
         "blockComment": ["{-", "-}"],
         "lineComment": ["--"]
+    },
+    
+    "turtle": {
+        "name": "RDF Turtle",
+        "mode": "turtle",
+        "fileExtensions": ["ttl"],
+        "lineComment": ["#"]
     }
 }