- aspnet/Mvc#2082
- problems specific to local `node` and related installations
- quote authenticode verification target
- quote local `node` library paths
- quote local `npm.cmd` path (with ye olde `/S` double-quoting hack)
- quote `--prefix` values in `npm install` commands
- quote `rimraf` directories to delete
- #144
- problems seem primarily to occur when `node` is globally installed but a
package (`grunt` or `bower`) is not; `npm install X` fails in this case
- create the `--prefix` directory first to avoid these installation failures
- change _node-install.shade to avoid confusion when directory exists