org.el: New maintainer

* doc/orgguide.texi:
* doc/org.texi:
* org.el: New maintainer.
ox: Fix `org-export-with-footnotes' behaviour

* lisp/ox.el (org-export--skip-p, org-export--interpret-p): When
  `org-export-with-footnotes' is nil, ignore completely footnotes
  references and definitions instead of exporting them verbatim.
* testing/lisp/test-ox.el: Add tests.
ox-icalendar: Small refactoring

* lisp/ox-icalendar.el (org-icalendar--combine-files): Small refactoring.
ox-icalendar: Ignore footnotes

* lisp/ox-icalendar.el (icalendar): Ignore footnotes.
ox-ascii: Minor fixes

* lisp/ox-ascii.el (ascii): Remove inexistant function.
org-list.el (org-sort-list): Fix infloop

* org-list.el (org-sort-list): Fix infloop.

Thanks to Samuel Wales for reporting this.
ob-R.el: allow use of alternative graphics devices

* lisp/ob-R.el (org-babel-R-graphics-devices): New defvar.
(org-babel-R-construct-graphics-device-call): Use it instead of a
hard-coded list of graphics devices.

The `org-babel-R-graphics-devices' variable now holds the association
between graphics file types and R functions.  This allows users by
modifying this alist to choose to use e.g. the Cairo* functions from the
R package “Cairo” or one of several alternative devices for SVG
output (SVGAnnotation, RSVGTipsDevice).
org-id.el (org-id-locations-save): Bind print-(level,length) to nil

* lisp/org-id.el (org-id-locations-save): Bind print-(level,length) to
nil in this function.

Having these variables set to non-nil values results in an unreadable
result being written to `org-id-locations-file'.
ob-core.el (org-babel-execute-src-block): fixes for :results none

* lisp/ob-core.el (org-babel-execute-src-block): Return nil in case of
`:results none'.  Also run `org-babel-after-execute-hook' in this
circumstance.

Previously, the code returned the string "results silenced" in the case
of =:results none=, as this is the return value of the call to
`message'; additionally, the after-execute hook was not being run.
Add 'light argument to some uses of org-babel-get-src-block-info

* lisp/ob-core.el (org-babel-do-key-sequence-in-edit-buffer)
(org-babel-expand-noweb-references)
* lisp/ob-tangle.el (org-babel-tangle): Use 'light argument to
`org-babel-get-src-block-info'.
Fix checkbox creation in numbered lists

* lisp/org.el (org-insert-heading): Check for checkbox at the
  beginning of the item, not just at the beginning of the line.

Without this fix, M-RET in numbered lists would create a checkboxed
item because it was using match data from a previous match.  Now we
make sure we go back to the beginning of the item, so that the match
really tells us if there was a checkbox there.
doc/orgcard.tex: Update version number

Also update etc/ORG-NEWS.
Merge branch 'master' of orgmode.org:org-mode
Merge branch 'master' of orgmode.org:org-mode