Update README.md for
Issue #3 Document where to request an application profile for Orcid
Issue #4 For config/application.yml document ORCID_EXISTING and ORCID_CLAIMED
Issue #6 Add to README localhost vs. 127.0.0.1
Issue #9 Document how to implement the widget
Merge branch 'master' into Issues-3-4-6-9

* master:
  Changing reference to sandbox.orcid.org
  Tweaking orcid initializer template

Resolves #3
Resolves #4
Resolves #6
Resolves #9

Conflicts:
	README.md