Working AJAX-style upload (no refresh needed)
Remove unnecessary submit button ID
Doesn't make sense to respond to JSON request
Update README.md
Add secret key base to make project work
Merge branch 'ajax-style'

* ajax-style:
  Add secret key base to make project work
  Update README.md
  Doesn't make sense to respond to JSON request
  Remove unnecessary submit button ID
  Working AJAX-style upload (no refresh needed)

Conflicts:
	README.md