conflicting doc and README

[mattrunchey]

In the generated components.txt :

# Whitespace is ignored.  The package name cannot contain a - character or
# other special characters.  The relative path should be the path to the
# folder containing the setup.py file for the package.

In the README.md, the example uses dashes :

For the simple case where your repository contains a single package that has its setup.py file in the root of your repository and works on python 2 and 3, you could add a line like:

project-identifier-without-spaces: ./

I presume the no dashes rule is relevant to the path names and not the actual pypi package names (many of which use dashes).