[Table] Add column resizing

#### Bug, feature request, or proposal:
Nice to have

#### What is the expected behavior?

right hand of the sort un-down icon, between column, add an vertical left-right line icon, it will show icon when mouse hover on the column border line
#### What is the current behavior?

NO
#### What are the steps to reproduce?
Providing a StackBlitz/Plunker (or similar) is the *best* way to get the team to see your issue.

Plunker starter (using on `@master`): https://goo.gl/uDmqyY

StackBlitz starter (using latest `npm` release): https://goo.gl/wwnhMV

#### What is the use-case or motivation for changing an existing behavior?
With sort/paging and html5 content edit, we can easily do grid edit now, even without cdk grid. But column resize is pain, we need add css separately.

#### Which versions of Angular, Material, OS, TypeScript, browsers are affected?

5
#### Is there anything else we should know?
group by column feature can implement via embedded html table

Comienza con los ejemplos enlazados de StackBlitz o Plunker para reproducir el comportamiento de la tabla de Angular Material e inspeccionar la implementación de la tabla que utilizan. Aclara con los maintainers la interacción de redimensionamiento y las superficies de la tabla afectadas antes de elegir archivos. Se considera terminado cuando los usuarios pueden descubrir cómo cambiar el tamaño de las columnas sin añadir CSS adicional.

Escrito por el modelo de indexación a partir del texto del issue.