plugman does not support windows (universal) target properly

For other versions such as cordova-android, cordova-ios, and cordova-wp8, it is possible to create a project using a local version and use plugman to install a plugin (such as sqlite plugin). This makes it much easier to test bug fixes and other changes before submitting them. But if I create a project using a local copy of cordova-windows, and use plugman to install a plugin such as https://github.com/litehelpers/Cordova-sqlite-storage (which includes a Visual C++ component for the Windows (Universal) version), then it does not work. If plugman would work properly with cordova-windows, it could have helped me test a possible solution to CB-8866.