Merge pull request #19 from Seeed-Studio/test-D

update readme

Author: chenwenhao568

README.md

@@ -192,3 +192,6 @@ Here, we’d also love to announce an open call for contributions to Codecraft o
 ## License
 
 The code contained in this repository and the executable distributions are licensed under the terms of the Apache License 2.0. The executable distributions contain third-party code licensed under other compatible licenses such as BSD-3.
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+TODO: add documentation on how to create new modules