Before we add more files to the template, I think we should make sure the template contains a README that documents, for each file in the template:

• What the file is for
• Why you would edit that file
• How to verify that the edits are valid
• How to test the file

The template is growing really big and it's not at all clear why some of these files are part of the user code and not just part of the framework.

We should also have a test that verifies that all files created by "flutter create" have an entry in this README file.