Fix indentation in source blocks

* lisp/org.el (org-indent-line): Indent source block contents
  according to line above when `org-src-tab-acts-natively' is nil.

* testing/lisp/test-org.el (test-org/indent-line): Update test.
ox-beamer: Fix environment selection wrt persistent tags

* lisp/ox-beamer.el (org-beamer-select-environment): Ignore persistent
  tags when displaying environments.

Thanks to Anders Johansson for reporting it.
http://permalink.gmane.org/gmane.emacs.orgmode/86441
Merge branch 'maint'
Add `org-increase-number-at-point' bound to C-M-S-<right>

* org.el (org-increase-number-at-point)
(org-decrease-number-at-point): New commands.
(org-mode-map): Bind them to C-M-S-<right> and C-M-S-<left>.
Fix previous commit by adding docstrings
org-table.el (org-table-copy-increment): Change increment behavior

* org-table.el (org-table-copy-increment): Use a number as a
way to force a fixed increment value.
(org-table-copy-down): Increment by the difference between the
current field and the field in the row above.  This is the
default behavior.  To go back to the previous behavior (to
always increment by 1 unit), set `org-table-copy-increment'
to 1.

Thanks to Michael Brand for suggesting this.
ob-core.el (org-babel-demarcate-block): Fix case

* ob-core.el (org-babel-demarcate-block): Upcase or downcase
the inserted #+begin_src and #+end_src depending on the
current case of #+begin_src and #+end_src.

Thanks to Alexander Baier for reporting this.
* org.el (org-set-regexps-and-options): Fix

* org.el (org-set-regexps-and-options): Allow
`org-complex-heading-regexp-format' to match [/] and [%]
cookies when they are both before and after the heading.

Thanks to Nicolas Bercher for reporting this.
Merge branch 'maint'
Fix code typo in 7ac468

Thanks to Michael for reporting it.
Continue enhancing 7ac468

Thanks to Michael Brand for his feedback.
org-table.el (org-table-eval-formula): Fix conversion of inactive timestamps

* org-table.el (org-table-eval-formula): Fix conversion of
inactive timestamps to active ones.

Thanks to Gang Chen for reporting this.
org.el (org-fast-tag-selection): Fix window splitting

* org.el (org-fast-tag-selection): Fix window splitting.

This is basically the same fix than the one listed here:
http://article.gmane.org/gmane.emacs.orgmode/34802

TINYCHANGE
Merge branch 'maint'
org.el (org-offer-links-in-entry): Reuse global variable

* org.el (org-offer-links-in-entry): Use global variable
  `org-any-link-re' instead of defining a string-equal local variable.

The `re' variable defined in function `org-offer-links-in-entry' is
string-equal to `org-any-link-re' and is hence replaced by the latter.

TINYCHANGE
org.el (org-insert-heading): Fix bug

* org.el (org-insert-heading): Fix bug when trying to insert a
heading when point is before the first headline and not at the
beginning of a line.
Merge branch 'maint'
Continue fixing fdb4b54e
Merge branch 'maint'
ob-R.el (org-babel-R-assign-elisp): Fix parsing of a one-dimensional value

* ob-R.el (org-babel-R-assign-elisp): Fix parsing of a
one-dimensional value.

Thanks to Daniil Mirylenka for the fix.