fix bee.json & Beefile watch_ext doesn't work

bee.json

@@ -1,7 +1,8 @@
 {
 	"version": 0,
 	"go_install": false,
-	"watch_ext": [],
+	"watch_ext": [".go"],
+	"watch_ext_static": [".html", ".tpl", ".js", ".css"],
 	"dir_structure": {
 		"watch_all": false,
 		"controllers": "",