some typo changes by AZ and BT
@k204230 AZ and BT fixed some typos in Data.md, Software.md, index.rst, and Overview.md. Mainly for testing how to handle this information page. Please merge.
@k204230 AZ and BT fixed some typos in Data.md, Software.md, index.rst, and Overview.md. Mainly for testing how to handle this information page. Please merge.