Merge branch 'signed-off-by'

* signed-off-by:
  Documentation/SubmittingPatches: Reference external DCO
  Documentation/developer-certificate-of-origin: Move the DCO into place
  developer-certificate-of-origin: Add v1.1 from the Linux Foundation

Signed-off-by: W. Trevor King <wking@tremily.us>
README: Document the new developer-certificate-of-origin file

Signed-off-by: W. Trevor King <wking@tremily.us>
README: Fix 'incorperate' and 'Includes' typos

Found with aspell.

Signed-off-by: W. Trevor King <wking@tremily.us>