Listener to Esc button

[matyas-igor]

Also it will be very cool add a listener to Esc button press event to close the latest message

[bradyclifford]

Add the ability to click the toaster and have it close. This could be a default set in the config.

[bradyclifford]

Add additional configuration settings similar to what is found in https://github.com/Foxandxss/angular-toastr.

Some examples:

• closeButton: Whether to display an "X" close button on the toast.
• closeHtml: Html element to be used as a close button.
• extendedTimeOut: The timeout after you hover a toast.
• newestOnTop: Add new toasts on top of the old one. Put on false to put them on the bottom.
• onHidden: A callback function called when a toast gets hidden.
• onShown: A callback function called when a toast is shown.
• tapToDismiss: Whether the toast should be dismissed when it is clicked.