Add cross-browser text-shadow' hack
Add cross-browser text-shadow' hack

See this Stack Overflow post for more info on using 'text-shadow' to get the same effect as 'text-stroke'...
https://stackoverflow.com/a/23981970
A separate 'text-shadow' hack for each main browser vendor is needed because only Webkit supports the 'text-stroke' property
fully, while in Edge and FF it's still buggy.

chocobuckle/oh-bugger,chocobuckle/oh-bugger