clean up README (a bit)

README

@@ -19,19 +19,43 @@ write the app in fennel. I want it to
 - show where I am on a map
 - record trail of where I've been (note: indoor counts too)
 
-we can use l"ove2d instead of dragging in that gtk stuff
 
-   SDL2
 
-   To run an SDL2 application on Wayland, set
+can we somehow do non-flakey bluetooth (is it dbus?)
-   SDL_VIDEODRIVER=wayland. 
-
-can we do bluetooth not through dbus? dbus seems to make it flakey
 
 
 
 cool extras
 ===========
 
-adjust screen brightness (go dark when not moving)
+adjust screen brightness 
+
+* turn off backlight when stopped after a minute
+* dim the screen when following a route and the next
+ navigation instruction is still some way off
+* tap to wake screen
+
+note that IPS LCD requires as much battery for dark pixels
+as light ones, so we get no power saving by colouring only part
+of the screen
+
+
+------
+
+random notes follow ...
+
+1) Satellite requires these commands to be run before
+it will work. 
+
+  mmcli -m 0 --enable
+  mmcli -m 0 --location-enable-gps-raw
+  mmcli -m 0 --location-enable-gps-nmea 
+  mmcli -m 0 --location-status
+
+
+2) we should make saturn give visual feedback while it's loading an
+app. How does it know when the app has finished loading?  Maybe it
+could get told when its window is obscured
+
+