Add documentation for contest, api.
remove api
Add requirements
Update README.md

minor edits
Update README.md
Update README.md
add api documentation
Merge branch 'master' of github.com:fastcolabs/target-retail-accelerator

* 'master' of github.com:fastcolabs/target-retail-accelerator:
  add api documentation
  Update README.md
  Update README.md
  Update README.md
  Add requirements
  remove api
  Add documentation for contest, api.