mdSelect and mdInputContainer for ngMessages

[brettstack]

In order to group ngMessages with mdSelect, there needs to be a container element. Should mdInputContainer be used for this? It seems to display fine, but the docs do not use it as an example.

[rschmukler]

@breandr could you give a demo of this with a plunker? Depending on how it looks we might add it to the docs as a good example?

[brettstack]

http://plnkr.co/edit/dTanrH7Qf4SBNYRKJQHM?p=preview

Unfortunately there is no css for the invalid color

[robertmesserle]

@rschmukler Please add a demo for validation along with this.

[brettstack]

My plunker includes validation