create new static view for news

As there currently is no way for an external app to display the habitrpg news, this is more or less a solution.
It adds a new static view, that only displays the content of the new-stuff modal. Surely not an ideal solution, but this way apps can display a webview and load the static view to display the news.

For normal users this changes nothing. For people writing the news this means that the file views/shared/new-stuff.jade has to be edited.