README.md in dev_flow-0.4.2 vs README.md in dev_flow-0.5.0

@@ -208,5 +208,8 @@
 - `dw update-roadmap` or `dw ur` used for update the roadmap, This command can only 
 be used on `devleop` trunk.
 
 - `dw clean` will delete local branches corresponding completed tasks.
 
+- `dw gantt` create HTML/Javascript based Gantt chart under `docs/` folder and push to remote server.
+
+- `dw tm [minutes]` start a stop watch timer for `minutes` (default is 25 minutes).