Add "Run Apps" for inovoking external tools from ST

It's a typical feature in IDEs such as Visual studio, Eclipse, ... Usually called "External Tools".

Very simple implementation: user can add customized applications, and then the commands will appear in command pallete which is very easy to invoke through "ctrl+shift+p".

repository/r.json

@@ -1177,6 +1177,16 @@
 				}
 			]
 		},
+		{
+			"name": "Run Apps",
+			"details": "https://github.com/liuhewei/run-app-sublime",
+			"releases": [
+				{
+					"sublime_text": "*",
+					"details": "https://github.com/liuhewei/run-app-sublime/tags"
+				}
+			]
+		},
 		{
 			"details": "https://github.com/qfel/RunCommand",
 			"releases": [