Use rshift for switching layouts.

Fixes non-available alt+SMTH combinations.
Updated readme.
xinitrc: use model pc86 for keyboard.
xmobarrc tweaks for netbook.

  * use wlp5s0 instead of eth0.
  * added battery widget.
xmonad: hide status-bar by default.

Looks like an ugly hack to me: send special message to all layouts.