Merge pull request #2 from sprewell20051116/dev

add example for config.txt

README.md

@@ -21,6 +21,17 @@ is_build_image=true
 is_install_image=true
 dut_ip_addr=192.168.1.x
 ```
+i.e.
+```
+user_password=xxx
+working_dir=firmware-13672
+repo_branch=firmware-volteer-13672.B
+is_build_packages=true
+is_build_firmware=true
+is_build_image=true
+is_install_image=true
+dut_ip_addr=192.168.1.2
+```
 ## execute command line
 ```
 # parameter is deprecated, please setup the user_passwork and repo_directory in config.txt