tests: Add test fullness option for test.py when running examples

I added the fullness specifier to both the C++ and the Python examples. By default, examples are assumed to be QUICK.

When an example is too long to be run under the current fullness option, it is flagged as skipped, which seems to differ from the tests. Please let me know if you'd prefer they be passed to the test runner, or just totally excluded with no message.

I tried to hit all the documentation for the examples-to-run.py file format, although I couldn't find a template for it in create-module.py. If you're aware of any other documentation on this file, please let me know

Fixes #170 (closed)