Vim: do not use NFA for regexpengine.

This fixes slow doxygen parsing when \b, \c… present in document.
+ vim-vinegar plugin.
vim-unite: remove constraints on maximum number of cache files.
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.