policy-framework.markdown: insert README.md content from masterfiles.git
Merge pull request #778 from tzz/doc/policy-framework2

policy-framework.markdown: insert README.md content from masterfiles.git
guide/installation-and-configuration/version-control.markdown: mention Enterprise VCS workflow
guide/writing-and-serving-policy/policy-framework.markdown: correct inclusions
guide/writing-and-serving-policy/policy-framework.markdown: tiny code block fix