log: Added --all option.

doc/git-annex-log.mdwn

@@ -34,6 +34,12 @@ showing each repository they were added to ("+") and removed from ("-").
   The [[git-annex-matching-options]](1)
   can be used to specify files to act on.
 
+* `--all`
+
+  Shows location log changes to all files, with the most recent changes first.
+  In this mode, the names of files are not available and keys are displayed
+  instead.
+
 # SEE ALSO
 
 [[git-annex]](1)

doc/todo/Log_function_to_enumerate_all_recent_git-annex_changes.mdwn

@@ -3,3 +3,5 @@ It would be great to have something to call in post-update-annex which would giv
 This could be `git annex log --all --max-count=1` or somesuch.
 
 This capability could alternatively be provided with a new post-transfer hook, called for every file.
+
+> [[done]] --[[Joey]]

doc/todo/Log_function_to_enumerate_all_recent_git-annex_changes/comment_2_18d1c7d8f4f0214c4d89119e9efb9b4a._comment

@@ -0,0 +1,16 @@
+[[!comment format=mdwn
+ username="joey"
+ subject="""comment 2"""
+ date="2016-07-17T19:09:41Z"
+ content="""
+Implelemented `git annex log --all`. It turned out to fit really well
+to add the functionality there.
+
+You can use --max-count, or even --since to limit the log
+that's displayed.
+
+The output streams, so you could just remember the first line you saw when
+running it before, and close the pipe when the subsequent run outputs that
+line. (Although this method may skip over changes that got merged in from
+another repository.)
+"""]]