Remove Yo PeerDependency
Remove Yo PeerDependency

Remove the Yo PeerDepency to prevent perpetual, often misleading "Unmet
PeerDependency" warnings when using NPM 3. The responsibility to install
Yo now rests on the end-user alone. "yo {generator name}" will already
succinctly inform the user should Yeoman be missing.

keystonejs/generator-keystone,keystonejs/generator-keystone