gnu elpa wants a "Maintainer:" pseudo-header
assign copyright to FSF
adding .elpaignore to keep extra file from package

* .elpaignore: Keep supplementary files out of the ELPA repo.
README and install instructions mention GNU ELPA

* NOTES: Install instructions mention GNU ELPA.

* README: Mention usage in Cask, and also the ability to install through
  the ELPA.