Improved mediaqueries and navlist

- did some adaptions from merging from bgfs

- implemented mediaqueries, breakpoints, debug output

- implemented navlist.js / mobile navlist
Improved navlist.js, CSS triangles, included files

- navlist.js improved

- imported boxsizing.htc for IE7 grid support

- imported PIE.htc, we will need it some time, i'm sure ;)

- imported greyscale.svg since i like to keep the desaturate mixin (firefox needs the SVG)

- implemented CSS triangles as mixin
Navlist re-implemententation

- CSS version, desktop dropdown, mobile flat

- Javascript: Hides CSS menu, replaces with own, touch-friendly "mobile" menu

- mobile menu hidden on desktop and tablet, visible on phone, css menu other
  way round

- happy :)