Voting: deploy preview to now

[sohkai]

Similar to #937, allows someone to deploy to nightly-voting.aragon.org with

now --target production

[coveralls]

Coverage remained the same at 98.0% when pulling af845f3 on deploy-preview-voting into 6c2654a on newstyle/voting.

[AquiGorka]

❤️
Should I merge this directly? Everytime a release happens with aragonUI the reference should be updated no? and every time a "significant" update is pushed will this be automatic or do I've to manually deploy?

[sohkai]

@AquiGorka Unfortunately as of now, this is not automatic (want to do some other things that will eventually allow us to make automatic staging deploys possible). But, once you install now's desktop app or @now/cli, you can (and should!) use the command above to deploy (assuming you've hooked up your now account properly).

The @aragon/ui version does not need to be changed if new alphas are published (they should get fetched automatically), but it is not a bad idea to keep moving it up anyway :). I've also updated the comment, it does not currently require you to link @aragon/ui, that was my mistake earlier :).