Snackbar Demo description

This is a developer DEMO of the SnackBar design pattern introduced in the Google Material Design guidelines.

- Set message text and optionally duration

- Shows only one message at a time

- Can have action item (e.g. undo, refresh, etc.)

- Set text color of action items

- Swipe down to dismiss all notifications

- Tablet support

- Backwards compatible to 2.3.x