Documentation and decision about "imposed directory structure"

[drewoldag]

This is feedback received from a user updating a pre-existing project with the PPT:

The LINCC Frameworks template does not impose a rigid directory structure. However, some of the tools that the template includes expect that the package source code will be in a first level directory named src, and that tests will be contained in a first level directory named tests.

We do make this claim, but it might be more valuable to give some indication of the various things that a user would have to do to modify directory structure that is provided out of the box.

Alternatively, we could retract this statement, and claim that the PPT does impose an expected directory structure that can be modified, but it will require extra work on the users part, and may become challenging to incorporate updates to the template in the future.