Support multiple validation error messages

## Bugs

Please include the following information with your bug report:

> What MDL Version are you using? (please be specific, e.g. _major.minor.patch_)

``` json
...
"material-design-lite": "^1.2.1",
...
```

> What browser(s) is this bug affecting (including version)?

all

> What OS (and version) are you using?

any

> What are the steps to reproduce the bug? Can you create a plunker/codepen/jsfiddle which reproduces it?

Using `vee-validate` with `vuejs`, which isn't important, but the fact that I can multiple validation errors at one time per field is:

``` vue

```

> What is the expected behavior?

that the error messages do not overlap on top of the next field

> What is the actual behavior?

the error messages overlap on top of the next field

> Any other information you believe would be useful?

*\* Source code**
https://github.com/airtonix/zenobi.us/blob/master/src/components/molecules/field-text.vue

*\* Recording of scenario**
!