Add "Gremlins"

[Sublime Gremlins](https://github.com/redoPop/SublimeGremlins) marks
Unicode whitespace characters that are otherwise invisible or visually
ambiguous (zero width spaces, no-break spaces, and similar).

repository/g.json

@@ -1537,6 +1537,17 @@
 				}
 			]
 		},
+		{
+			"name": "Gremlins",
+			"details": "https://github.com/redoPop/SublimeGremlins",
+			"labels": ["unicode", "utf8"],
+			"releases": [
+				{
+					"sublime_text": ">=3000",
+					"tags": true
+				}
+			]
+		},
 		{
 			"name": "Grep Code Search",
 			"details": "https://github.com/topikachu/sublime-text-2-GrepCodeSearch",