Update modeline org files to match code

modeline/cpu/README.org

@@ -5,7 +5,14 @@ Put:
 #+END_SRC
 In your =~/.stumpwmrc=
 
-Then you can use "%c %t" in your mode line format.
+Then you can use:
+
+%c (CPU usage as %)
+%C (CPU usage as bar graph)
+%t (CPU temperature)
+%f (CPU frequency)
+
+in your mode line format.
 
 ** Notes
 

modeline/disk/README.org

@@ -8,6 +8,9 @@ Put:
 into your =~/.stumpwmrc=
 
 Then you can use "%D" in your mode line format.
+
+Filesystem(s) to be displayed can be customized by modifying the *disk-usage-paths* list.
+
 You can customize the modeline format (*disk-modeline-fmt*). 
 
 The default value for displaying disk usage information on the modeline.
@@ -23,4 +26,3 @@ The default value for displaying disk usage information on the modeline.
 | %p   | Filesystem used space in percent |
 | %m   | Filesystem mount point           |
 |------+----------------------------------|
-

modeline/maildir/README.org

@@ -10,6 +10,9 @@ Then you can use "%M" in your mode line format.
 You can customize the modeline format (*maildir-modeline-fmt*). See the
 documentation for *maildir-modeline-fmt* for more information.
 
+** Notes
+
+The %M mode line formatter is also used by the 'mem' module.
+
 ** Tasks
 *** TODO Add per mailbox formatter
-

modeline/mem/README.org

@@ -11,4 +11,4 @@ Then you can use "%M" and/or "%N in your mode line format.
 
 ** Notes
 This is specific to Linux.
-
+The %M mode line formatter is also used by the 'maildir' module.

modeline/wifi/README.org

@@ -21,3 +21,8 @@ stumpwm to freeze.
 
 <2014-03-16 Sun> This is a fairly old file, maybe the bug was fixed?
 Can someone confirm?
+
+<2017-08-11 Fri> I've had this running all day and not had any problems yet:
+Debian Jessie 8.8 x86_64
+SBCL 1.3.17
+stumpwm 1.0.0-111-gb740b04