Feature request: Allow no-op/lazy translations

Followup from #53

Sometimes it’s necessary to mark strings which will be translated in the future, but leave them intact for now:

import { Trans, noop } from 'lingui-react'

const menu = [
  { to: '/about', title: noop('About') },
  { to: '/contact', title: noop('Contact') },
]

// later in the code
const Menu = () => 
  <div>{
    menu.map(item => 
      <Link to={item.to}>
        <Trans id={item.title} />
      </Link>)
  }</div>

[tricoder42]

Alright, added in latest releases:

• lingui-cli@1.3.2
• lingui-i18n@1.3.0
• lingui-react@1.2.0

The function is named i18nMark after all. See the docs for more info.

[vitexikora]

Awesome!