Merge "revisions to the Building Your First app class with feedback from...
Merge "revisions to the Building Your First app class with feedback from mpawlan (thank you!)" into nyc-dev am: 96357564 am: a4afe006
am: fad1a4f3
Change-Id: Id5b65f07e73992e3f50a1d9643e6abf3c7897a98