The difference in the stock reader is minimal (only a change in the URL passed to the MediaScannerService), but as it worked for me with the rest of the 1.0.05 firmware, I kept it with the 1.0.07 source.
Changes in the posted version are copied from
morkl's JuneReader, extended to display battery percentage.
And a soon coming update will include time/battery display refresh on screen wakeup after standby.