Editing: Automatic empty lines before new entries.

Editing: Automatic empty lines before new entries.

The variable `org-blank-before-new-entry' regulates if Org should
insert a blank line before a new entry, when making a new headline or
plain list item.  Up to now, the possible values in each case where t
or nil, i.e. unconditionally do or don't insert a blank line.

Now each setting can also be `auto'.  If this is the case,  Org will
look if the current entry, of which the command creates a sibling,
does have a blank line before it.  If yes, it will also make a blank
line.  If not, it will not.  This seems so useful that I have made
this behavior the default.