Smart Backspace (#6309)

* add Smart Backspace

* use 'tags' key instead of 'branch', require Sublime >=3000

repository/s.json

@@ -2003,6 +2003,17 @@
 				}
 			]
 		},
+		{
+			"name": "Smart Backspace",
+			"details": "https://github.com/awhite/sublime-smart-backspace",
+			"labels": ["text navigation"],
+			"releases": [
+				{
+					"sublime_text": ">=3000",
+					"tags": true
+				}
+			]
+		},
 		{
 			"name": "Smart Delete",
 			"details": "https://github.com/mac2000/sublime-smart-delete",