fix shorten IA for new IA API
use closure & callback for shorten.js & fixes
use new css for shorten IA
remove shorten mobile special case
remove is.gd tag from shorten name
use spice to/from trickery to workaround nginx

https://github.com/duckduckgo/zeroclickinfo-spice/pull/974#issuecomment-49613154
urlencode shorten spice to
fix shorten tests and guard regex
i.e. makes me sad
shorten line-height to prevent IE vertical scroll/drag
Merge branch 'pr/974'