Default avatars

Someday you'll be able to edit your avatar. Until then, put a bird on
it.
Clean up test files

Moved all test code into /test. Renamed test.js to crypto_test.js.
(Let's try to keep test files topical.) Merged test_views.html and
test.html into a single test/index.html.

Todo: use Grunt to generate test/index.html from index.html and files
found in /test. Also, write more tests.