created the continue later and new round options

There are a few issues that need to be addressed at this point:

1. There is an error when user clicks continue when they haven't started a round yet. We should either may the button appear conditionally if they have started a round with that game yet, or find a way to redirect it
to the creation of a new round. 

2. We also need to make sure that the first card that we draw on the continue route hasn't 
been used already.