Add Question.multiline and associated handling

Some questions can't be answered in a single line without reqiring
more shell knowledge than we need (e.g. `&&`).
quizzes/git: Add preliminary Git quiz (repository creation)
COPYING: Distribute quizzer under the GPLv3+
README: Mention Python 3.3 dependency
README: Flesh out description and add example typescript
setup.py: Package with distutils
MANIFEST.in: Distribute COPYING and quizzes/*.json
.gitignore: Ignore MANIFEST and dist/ packaging side effects
Add `# Copyright` tags to Python files
.update-copyright.conf: Configure update-copyright.py

http://blog.tremily.us/posts/update-copyright/
http://pypi.python.org/pypi/update-copyright/
Run update-copyright.py