revise readme

README.md

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+> Author: Jun Shang
+> Email: shangjunv@163.com
+> Last Updates: 23/11/2019
+
+#### Requirements
+
+- choppy
+- Ali-Cloud
+
+```
+$ source activate choppy
+$ choppy install huangyechao/wgs-somatic-latest
+$ choppy apps
+```
+
+#### quick start
+
+```
+$ choppy batch huangyechao/wgs-somatic-latest sample.csv --project-name Your_project_name
+```