VE-1682: VEnus

Load VisualEditor in the Venus skin.
This one looks ok.
What about different breakpoints?
https://github.com/Wikia/app/blob/VE-1682/extensions/wikia/Venus/styles/article/article.scss#L264
https://github.com/Wikia/app/blob/VE-1682/extensions/wikia/Venus/styles/article/article.scss#L333