Jurgen Defume asked for a way to display only logging information in
the agenda. This patch implements such a possibility. It works by
calling `org-agenda-log-mode' (bound to `l' in the agenda) with a
double prefix arg. This sets the variable `org-agenda-show-log' to a
special value `only' which is then interpreted by the agenda-creating
functions.
Org-mode uses a special setup with a number of different customization
variables to specify how a file should be opened when following a
:file:..." link with `C-c C-o'. By using a `C-u' prefix, it was
possible to overrule the customized setup and to force opening the
file in Emacs.
Samuel Wales requested to amend this process, so that a double prefix
argument would do the opposite: force opening the application *outside*
of Emacs, using a system default application. This is what this patch
implements.
Internally this works through a new entry in system specific constants
`org-file-apps-defaults-gnu', org-file-apps-defaults-macosx', and
`org-file-apps-defaults-windowsnt'. The new entry has the car
`system' and specifies the command that should be used for the double
C-u calls. As before, the user option `org-file-apps' can overrule
these default settings.
Note that all this only applies to following "file:" links, and does
not make a difference for, for example, "http:" links.
Now we have separate ChangeLog files in the lisp and doc
directories. Also, in the lisp directory, all the old changes
have moved into ChangeLog.01.
These changes will help me to simplify synchronization with Emacs.
