Made style changes and added remaining course material.


Former-commit-id: 65b02fb7f7ccf81905869328da4cccd29e61632f
Modified manifest to prefer installation on external memory.


Former-commit-id: 76a42620614452ea4bc6d0a0e35ac324ca2c62d9
Changed out course documents and launcher icon.


Former-commit-id: 607907174624f78d0143b39308b776535b0ceb2a
Removed asset files not needed for testing so that everything fits under github's file size limit.


Former-commit-id: 5835ed7579b19b380feca28119f8026aebd9ea7d
Removed old resources.ap_


Former-commit-id: cd42705bc3fc8ec67adc18303e5d89c3de4eb3a9
Clean commit for BFG.


Former-commit-id: 42294faf0413f65c1541d35b907e869aa4ce5434