Update READMEs
Rename some list variables

* org-element.el (org-element-paragraph-separate): Use
new name `org-list-allow-alphabetical'.

* org-list.el (org-list-allow-alphabetical): Rename from
`org-alphabetical-lists'.
(org-list-empty-line-terminates-plain-lists): Rename from
`org-empty-line-terminates-plain-lists'.
(org-checkbox-hierarchical-statistics): Rename from
`org-hierarchical-checkbox-statistics'.

* org.texi (Plain lists, Checkboxes): Use non-obsolete
variable names.
testing/lisp/: Use non-obsolete variable names (see previous commit)

* test-org-list.el (test-org-list/cycle-bullet)
(test-org-list/move-item-down, test-org-list/move-item-up)
(test-org-list/insert-item): Use non-obsolete variable names.

* test-org-element.el (test-org-element/at-point): Use
`org-list-empty-line-terminates-plain-lists'.
ox: Fix coding system problem in asynchronous export

* lisp/ox.el (org-export-async-start): Use correct coding system so
  unibyte characters do not appear in the resulting buffer or file.
org-element: Allow to escape escaping character before a comma

* lisp/org-element.el (org-element-macro-parser): Allow to escape
  escaping character before a comma.  Also do not trim spaces at
  argument boundaries.
* doc/org.texi (Macro replacement): Update documentation about
  possible locations and escaping mechanism.
* testing/lisp/test-org-element.el: Add tests.

With this patch, macro's arguments are read as the following:

  "a,b"     -> '("a" "b")
  "a\,b"    -> '("a,b")
  "a\\,b"   -> '("a\" "b")
  "a\\\,b"  -> '("a\,b")
  "a\\\\,b" -> '(a"\\" "b")

Note that with the patch, you only need to escape backslashes before
a comma:

  "a\\b\,c" -> '("a\\b,c")
mk/server.mk: Fix doc-up

Also upload org.pdf and orgguide.pdf
ob-core.el (org-babel-hash-show-time): tiny Docstring enhancement

* ob-core.el (org-babel-hash-show-time): tiny Docstring enhancement.
contrib/lisp/ox-confluence.el (org-confluence-empty): Fix typo

* contrib/lisp/ox-confluence.el (org-confluence-empty): Fix typo.
org.texi (Setting tags): Tiny formatting fixes

* org.texi (Setting tags): Tiny formatting fixes.
org.texi (Tag groups): New section

* org.texi (Tag groups): New section.
org.texi (Matching tags and properties): Explain group tags expansion as regular expressions

* org.texi (Matching tags and properties): More examples.
Explain group tags expansion as regular expressions.
orgguide.texi (Tag searches): New section

* orgguide.texi (Tag searches): New section.
doc/org.texi: Reflect changes from the new export engine

* org.texi (Sparse trees, Agenda commands)
(@LaTeX{} fragments, Selective export, Export options)
(Export options, Export options, The export dispatcher)
(ASCII/Latin-1/UTF-8 export, ASCII/Latin-1/UTF-8 export)
(HTML Export commands, HTML Export commands)
(@LaTeX{}/PDF export commands, @LaTeX{}/PDF export commands)
(ODT export commands, ODT export commands, iCalendar export)
(Publishing options, Publishing options)
(Triggering publication, In-buffer settings): Update to
reflect changes from the new export engine.
Implement group tags

* org-agenda.el (org-tags-view): Set the matcher after
preparing the agenda, as `org-tag-groups-alist-for-agenda'
might be needed.
(org-agenda-filter-make-matcher): New parameter `filter' and
`type'.  Handle group tags.
(org-agenda-filter-expand-tags): New function.
(org-agenda-filter-apply): Handle group tags.

* org.el (org-blank-before-new-entry): Tiny docstring fix.
(org-tag-alist-for-agenda): Add docstring.
(org-tag-groups-alist-for-agenda): New global variable.
(org-tag-groups-alist): New buffer-local variable.
(org-tag-alist, org-tag-persistent-alist): Handle :grouptags.
(org-group-tags): New option.
(org-toggle-group-tags): New command.
(org-mode-map): Bind `org-toggle-group-tags' to `C-c C-x q'.
(org-set-regexps-and-options-for-tags): New function, factored
out from `org-set-regexps-and-options'.
(org-set-regexps-and-options): Don't handle tags, they are now
handled separately by `org-set-regexps-and-options-for-tags'.
(org-assign-fast-keys): Handle :grouptags.
(org-mode): Use `org-set-regexps-and-options-for-tags' on top
of `org-set-regexps-and-options'.
(org-fontify-meta-lines-and-blocks-1): Fontify group tags.
(org-make-tags-matcher): Expand group tags in the matcher.
(org-tags-expand): New function.
(org-tags-completion-function): Tiny code clean up.
(org-set-current-tags-overlay): Add a docstring.
(org-fast-tag-selection): Highlight group tags.
(org-agenda-prepare-buffers): Set `org-tag-alist-for-agenda'
and `org-tag-groups-alist-for-agenda'.  Don't uniquify
`org-tag-alist-for-agenda' as we may need the grouping
information for filtering in the agenda buffer.
(org-uniquify-alist): New function.

* org-pcomplete.el (pcomplete/org-mode/file-option/tags):
Handle :grouptags.

* org-faces.el (mode-line): New face for group tags.
org.el (org-refile-cache-check-set): More informative message

* org.el (org-refile-cache-check-set): More informative message.

Thanks to Samuel Wales for raising this.
org-agenda.el: Re-align leaders to the left

* org-agenda.el (org-agenda-scheduled-leaders)
(org-agenda-deadline-leaders): Re-align leaders to the left,
back to a 11 characters width.

Thanks to Matt Lundin for reporting display problems here.
bugfix: fix `org-babel-execute-src-block' on remote hosts

* lisp/ob-core.el (org-babel-temp-file): For remote hosts, modify the prefix
  and leave `temporary-file-directory' unchanged.

The reason setting `temporary-file-directory' doesn't work here is
because `make-temp-file' recursively calls itself (indirectly).
Modifying `temporary-file-directly', affects the recursive calls as well,
which results in a "No such file file or directory" error.

The fix is to leave `temporary-file-directory' unaltered, for remote
hosts, and instead modifying the 'prefix' argument to `make-temp-file'
appropriately.

TINYCHANGE
org.el (org-set-regexps-and-options): Don't read setup files from read-only buffers

* org.el (org-set-regexps-and-options): Don't read setup files
from read-only buffers.
(org-file-contents): When no-error is non-nil, throw a less
intrusive message.

This commit prevents Gnus to try reading arbitrary files on your machine
when opening a message with #+SETUPFILE keyword.

In general, it prevents reading a setup file from any read-only buffer.

Thanks to Eric Abrahamsen and Andreas Leha for reporting this.
Merge branch 'master-group-tags2'
Work around calc-eval regression

* lisp/org-table.el (org-table-eval-formula): Work-around for
  calc-eval regression.

Calc-eval can no longer be called without initializing the
*Calculator* buffer first.