* contrib/lisp/org-eww.el(org-eww-copy-for-org-mode): Realization of
the kill.
(org-eww-goto-next-url-property-change,
org-eww-no-next-link-p, org-eww-url-below-point): Auxiliaries
for accessing a eww buffer
(org-eww-extend-eww-keymap): Add the new kill to eww keymap
The code has emerged from the very similar org-w3m.el.
* contrib/lisp/org-eww.el: New file
* contrib/README: Added org-eww.
* lisp/org.el (org-modules): Add org-eww to the pool of org-modules.
The hook gets hooked in the module.
The file is more or less a fraction of the org-w3m module with 'w3m'
replaced by 'eww'.