if new timer has a timeout later than a timer in queue, the
new timer will be discarded and never be pushed into timer queue.
This is fixed by pushing new timer without timeout checking
and then sorting the queue according to timer timeouts.
This should fix#520 and #495.
When the the power_off switch is pulled a empty SYN_REPORT is generated and koreader crashed on a DEBUG line.
The DEBUG lines now generate identically spaced output, which makes it easier to read by eye.
While debugging ```GestureDetector:panState(tev)``` I saw that the TRACK ID never had -1 values .
So back to debugging ```input.lua```.
Now the Kobo Aura can pinch and expand.
Screen.width and Screen.height are now gone, use the methods
getWidth() and getHeight() to get the relevant data. They will
take blitbuffer/framebuffer rotation into account.
