Avoid using `case' in default value of defcustom

* lisp/org-ctags.el (org-ctags-path-to-ctags): Avoid usine `case'.
Mention Sean Escriva in the Manual

* doc/org.texi (MobileOrg): Mention the new iPhone developer.
ox-latex: Fix regular caret protection

* lisp/ox-latex.el (org-latex-plain-text): Protect ^ char with \^{},
  not only \^, so it doesn't become a diacritic.
Merge branch 'maint'
ox-html: Remove code relative to bibliography

* lisp/ox-html.el (org-html-inner-template): Remove code relative to
  bibliography.
(org-html-bibliography): Remove function.

Bibliography is handled by the contrib/ package "ox-bibtex.el".
Merge branch 'maint'
org.el: Make orgstruct++-mode overwrite local non-org vars again.

* org.el (orgstruct++-mode): Overwrite local non-org vars again.
org-element: Be stricter when matching arguments in LaTeX environments

* lisp/org-element.el (org-element--current-element): Be stricter when
  matching arguments in LaTeX environments.  In particular, do not
  allow anything else than options and arguments in the opening line.
* testing/lisp/test-org-element.el: Add tests.
Merge branch 'maint'
ox: Fix radio target resolution

* lisp/ox.el (org-export-resolve-radio-link): Fix radio target
  resolution.
* testing/lisp/test-ox.el: Add test.
Merge branch 'maint'