Remove 'targets' from 'delegated targets roles' to be consistent with the PEP text
Add section explaining how package managers establish the initial trust on root keys and discuss solutions for PyPI projects hosted externally
Update README.rst
Update README.rst

external hosting edits...
Merge pull request #1 from JustinCappos/master

Edits from our meeting...
Add section for establishing initial trust for root keys and minor edits to section on external hosting
Merge pull request #8 from vladimir-v-diaz/master

Add Sections Requested by Nick