Python task manager from scratch, part 15: Prepare the way

I still, every time, get a thrill from seeing a Web interface to a new prototype. We're almost there. First we'll:

• Add the dependency on the Web framework;
• Remove old code;
• Make sure the tests still pass and the Web framework works as intended.

The steps

• Delete all current code from main.py. If anything, this should have been done earlier.
• Add bottle to requirements.txt (recall that's where other tooling looks to determine what code our code depends on).
• Install that dependency (with the setup I have, by doing pip install -r requirements.txt at the command line).
• Add code minimally exercising that dependency to main.py.
• Running pytest to verify that the remaining tests still pass.
• Manually verifying that the minimal exercise of the bottle dependency works by opening a Web browser and navigating to 0.0.0.0:8000.

Here's the current commit in the veery/ repository.