Move Node.js SemVer API into a separated plug-in

The API for Node.js SemVer realization is moved into a separated plug-in due to allow Bower plug-ins not to depend on Node.js Core plug-in.

Also, the .settings/ folders were removed from the repository for Bower plug-ins.

Signed-off-by: vrubezhny <vrubezhny@exadel.com>