Update coopr-ngui.rb
Update coopr-ngui.rb

use `distribute` task, which will build, minify, and revision-tag ngui static assets.
cdapio/omnibus-coopr,caskdata/omnibus-coopr,caskdata/omnibus-coopr,cdapio/omnibus-coopr,caskdata/omnibus-coopr,cdapio/omnibus-coopr