What about supporting browsers without support of flexbox?

Should we support browsers with no support of flexbox? Seems **IE 9 and 8** does not have support for flexbox. Maybe we can fallback to `table` view with columns:

``` html

items..
items..

```

@ademilter If you think supporting this is not required and will be overkill for its simplicity, we can just do not support.

PS. Calculating height of table columns may have problems and we can have problems with responsiveness.