Updated Roboto webfont cache

Also added all other Roboto styles, weights and variants
Added KitKat mode to the extension
Switched to TTF fonts (better readability in Windows)

Also added Droid Sans mono font and made a few tweaks and fixes
Added KitKat css to the manifest and begun tweaking stuff
CARDS! Cards everywhere
Holo everywhere!
Moar kitkat!
Fixed hover issues with post buttons (eg. Like)
Menu buttons status fixes
Fixed Roboto CSS (was not applied to middletext)
Fixed header (user greeting and unread links)
First part of main header overhaul
Second part of main header overhaul
Third part of main header overhaul
Fourth and last part of main header overhaul
Fixed forum menu dropdowns
Prettified kitkat CSS
Fixed subs search field
Fixed subs search field autocomplete
Fixed footer and menu keyboard navigation