Revert "Rename README to README.md"

This reverts commit 5faebad532dec5e7531b61399526ac7de7d9f698.
Revert "fix file type"

This reverts commit 6b5c924e6699772df157b4db00579050429aff63.
Revert "first release commit"

This reverts commit 3b1b1755fbc34422de3d4a4c37ba9b3091fbcd85.
First release commit