Refactored and extracted Snack and SnackContainer from SnackBar. Users can new call new SnackBar().show() without problems. #32
Merge pull request #1 from chris2toasters/new_snackbars_#32

 new_snackbars_#32
Fix for incorrect stacking order of messages.
Switched SnackContainer to use a Queue instead of a Stack.
Merge pull request #47 from chris2toasters/master

Fixed issue with creating multiple SnackBars #32