update API description to include chunking

update API description to include chunking, and split the API
description into a seperate file
remove an extra headline
Update API.md

formatting
Update API.md

more formatting
Update API.md

more formatting
Update README.md

formatting
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update API.md
Update README.md
Update API.md
Update README.md
Update API.md