Responsive Container

[ivanvanderbyl]

We currently do some auto resize handling on the main primer-plot, however, this is not always what you want, so instead, we should support different container components, either by name or direct implementation.

1. A basic or static container which accepts width and height attrs directly to specify size.
2. A responsive container, which automatically fills width=100% and height=auto.
   2.1. Optionally specify an aspect ratio to maintain.