Fix error prone babel table output format detection

* ob-core.el (org-babel-insert-result): Test all list elements against
listp and (eq element 'hline) instead of checking just the first.

org-babel table output uses different formatting for a list of lists,
but detects it incorrectly causing an error. An example of a block
causing an error is an emacs lisp source block containing just 1 line:
'((1) 2)
Merge branch 'maint'
org-table.el (org-table-copy-down): Fix copying from a blank field

* org-table.el (org-table-copy-down): Fix copying from a blank
field.

Thanks to Michael Brand for reporting this.
ox-org: Fix missing footnote definitions

* lisp/ox-org.el (org-org-headline): Ignore footnote sections.
(org-org-section): New function.

Some footnote definitions may be outside of the scope of the export
and, therefore, do not appear in the generated output.  This patch
ensures that all footnote definitions appear at the end of the section
they belong to.

Thanks to Leonard Randall for reporting it.
http://permalink.gmane.org/gmane.emacs.orgmode/86558
Fix previous commit
Merge branch 'maint'
Merge branch 'master' of orgmode.org:org-mode
org-attach.el (org-attach-dir): Fix bug

* org-attach.el (org-attach-dir): When the property is
"inherited" from a variable outside of the file, do not use
`org-entry-property-inherited-from' to find the attachment
position, assume we need to go back to the current headline.
Merge branch 'maint'
ox-org: Tiny refactoring

* lisp/ox-org.el (org-org-section): Tiny refactoring.  Use appropriate
  property.
Merge branch 'maint'
org-agenda.el: Rewrite agenda filtering using text properties

* org-agenda.el (org-agenda-write): Code cleanup.
(org-agenda-mark-filtered-text)
(org-agenda-unmark-filtered-text)
(org-agenda-fix-tags-filter-overlays-at): Delete.
(org-agenda-remove-marked-text): Use the `property' argument
instead of hard-coding 'org-filtered.
(org-agenda-filter-remove-all): Use `org-agenda-finalize'.
(org-agenda-filter-hide-line): Rewrite using text properties
instead of overlays.
(org-agenda-remove-filter): New function.
(org-agenda-filter-show-all-tag)
(org-agenda-filter-show-all-cat)
(org-agenda-filter-show-all-re): Rewrite using
`org-agenda-remove-filter'.
Merge branch 'maint'
Make the point visible when jumping to the mark

* org.el: Advise commands which jump to the mark.
org.el (org-entry-properties): Ensure the special property is not commented out when matched

* org.el (org-entry-properties): Ensure the special property
is not commented out when matched.

Other an agenda view like (tags "DEADLINE<\"<+0d>\"" ...) will
wrongly list an entry with a commented out DEADLINE line, because
org-agenda-skip only skip commented out stuff on the current line,
with is the headline itself when using "tags" agenda.

Thanks to Sébastien for reporting this.
org-agenda.el (org-agenda-redo): Reapply the filters correctly

* org-agenda.el (org-agenda-redo): Reapply the filters
correctly.

TINYCHANGE
Merge branch 'maint'
lisp/ob-scheme.el: Fix scheme code blocks execution error in batch mode

* ob-scheme.el (org-babel-scheme-capture-current-message)
(org-babel-scheme-execute-with-geiser): Capture scheme code results
via `current-message' both in interactive mode and non interactive
mode.

`org-babel-scheme-execute-with-geiser' uses `current-message' to get
the results of scheme code blocks, but `current-message' always
returns nil in batch mode, and this patch fixes this.
org-agenda.el: Fixes for top headline filtering

* org-agenda.el (org-agenda-local-vars): Add
`org-agenda-top-headline-filter'.
(org-agenda-filter-by-category): Fix syntax.
(org-agenda-filter-show-all-top-filter): New function.
(org-agenda-filter-by-top-headline)
(org-agenda-filter-remove-all): Use the new function.
(org-agenda-filter-top-headline-apply): Use a dedicated symbol
`top-headline'.

Thanks to Greg Troxel who provided a preliminary patch.
Merge branch 'maint'