Bug 87442

Avoid confusion arising from app-root/repo/node_modules/read.me implying that read.me file should not be removed when force_clean_build marker is present.

app-root/repo/node_modules/read.me is now removed, and app-root/repo/README.md will point to updated documentation at https://github.com/openshift/origin-server/blob/master/cartridges/openshift-origin-cartridge-nodejs/README.md, which explains the purpose of the node_modules directory.