ox-latex: Tiny fix to latex-matrices pseudo-elements

* lisp/ox-latex.el (org-latex--wrap-latex-matrices): Make sure
  contiguous element is also an Org table.
ox-latex: Possibly make a matrix out of tabular environment

* lisp/ox-latex.el (org-latex--math-table): Properly create matrix if
  "tabular" environment is used.  Make sure cells are centered instead
  of applying usual alignment rules.
org.texi: Remove extraneous backslash in key sequence

* doc/org.texi (ASCII bar plots): Remove the backslash character in
the key binding sequence for orgtbl-ascii-plot command.

I think that this backslash is not needed, since previously in the
same section, at subheading "Graphical plots using Gnuplot", there is
a similar key sequence without backslash @kbd{C-c " g}.

TINYCHANGE
org-clock.el (org-clock-select-task): Kill temporary buffer

* org-clock.el (org-clock-select-task): Kill temporary buffer.

Thanks to Marcin Borkowski for this idea.
contrib/lisp/org-velocity: Fix failure for big window

* contrib/lisp/org-velocity.el (org-velocity-incremental-read): Reversed
  the estimation against window-height.
org.el: Use normalized names in org-agenda-file-p

* lisp/org.el (org-agenda-file-p): Make sure all filenames are
normalized before performing comparison.
org.el: Fix bindings of < and > for calendar scrolling

* lisp/org.el (org-read-date-minibuffer-local-map): Switch to the
  current calendar API for scrolling the calendar.
ORG-NEWS: Document new options
Merge branch 'maint'
Bump Emacs version

* lisp/ob-core.el (org-babel-examplize-region):
* lisp/ob-exp.el (org-babel-exp-inline-code-template):
* lisp/org-table.el (org-table-copy-increment):
(org-table-formula-create-columns):
* lisp/org.el (org-agenda-ignore-drawer-properties):
(org-agenda-ignore-properties):
* lisp/ox-ascii.el (org-ascii-list-margin):
* lisp/ox-html.el (org-html-format-headline-function):
(org-html-format-inlinetask-function):
* lisp/ox-latex.el (org-latex-hyperref-template):
(org-latex-custom-id-as-label):
(org-latex-format-inlinetask-function):
(org-latex-known-warnings):
* lisp/ox-odt.el (org-odt-format-headline-function):
(org-odt-format-inlinetask-function):
* lisp/ox-texinfo.el (org-texinfo-format-headline-function): Bump
  Emacs version.
ox: Remove unnecessary code comments
ox-latex: Change default value for `org-latex-caption-above'

* lisp/ox-latex.el (org-latex-caption-above): Change default value.

`org-latex-table-caption-above' is removed completely since default
value do not match anymore.

See <http://permalink.gmane.org/gmane.emacs.orgmode/91363>.
ox-html: Fix bug in c9ca0b6d.

* ox-html.el (org-html-inlinetask): Fix bug.
Fix Flyspell check in row separators and empty verse blocks

* lisp/org.el (org--flyspell-object-check-p): New function.
(org-mode-flyspell-verify): Check that table row or verse block under
point is not empty.  Use previous function.
ob-clojure.el: Fix compatibility issue

* lisp/ob-clojure.el (org-babel-execute:clojure): Fix compatibility
    issue with cider >0.7.0.
Update property drawer and node property regexps

* lisp/org.el (org-property-drawer-re, org-property-re): Update
  regexp.
org-element: Update property drawers parsing

* lisp/org-element.el (org-element--get-node-properties,
  org-element--get-time-properties): New functions.
(org-element-headline-parser, org-element-inlinetask-parser): Use new
functions.
(org-element-property-drawer-parser): Change signature.  Simplify
parsing.
drawer.
(org-element--current-element, org-element--next-mode): Property
drawers are located right after a headline or a planning element.

* testing/lisp/test-org-element.el (test-org-element/drawer-parser,
  test-org-element/node-property,
  test-org-element/property-drawer-interpreter): Update tests.
(test-org-element/property-drawer-parser): Add tests.
* testing/lisp/test-org.el (test-org/indent-line,
  test-org/indent-region, test-org/forward-paragraph,
  test-org/backward-paragraph): Update tests.
Update `org-get-property-block'

* lisp/org.el (org-at-property-p): Rewrite.  Don't use `org-element-at-point'.  It
is faster to retrieve the property drawer location instead.
(org-get-property-block): Update function and docstring.  Change
  signature.
(org-entry-properties, org-entry-put, org-buffer-property-keys): Apply
signature change.
Update property API

* lisp/org.el (org-entry-put): Refactor code, taking into account
  changes to property drawer syntax.  Fix errors when handling special
  values, which cannot be symbols.  Remove CLOCKSUM handling.
(org-entry-get): Refactor code.
(org-entry-delete): Small refactoring, do not rely on
`org-remove-empty-drawer-at' since parser is not necessary here.
(org-buffer-property-keys): Fix infloop.  Ignore final "+" in extended
properties.  Refactor code.
(org-property-values): Include extended values.
(org-entry-get-with-inheritance, org-insert-property-drawer): Small
refactoring.
(org-insert-drawer): Fix docstring and comments.
(org--update-property-plist): Renamed from org-update-property-plist.
Use side effects.  Improve speed.

CLOCKSUM special property in `org-entry-put' is buggy (symbols instead
of strings) and ignores provided value.  Since the expected behaviour
is neither clear nor documented, the property is not handled anymore
by the function.
Rewrite `org-entry-properties'

* lisp/org.el (org-special-properties): Remove "CLOCK" as a special
  keyword.
(org-entry-properties): Rewrite function according to property drawer
syntax.  Change signature.
(org-entry-get): Apply signature change.

"CLOCK" removal is motivated by the fact that it isn't listed as
a special keyword in the manual, it is not used throughout the code
base, and there is no meaningful value for this property.