On Windows, Yeoman generator should stop with error if your NPM version is too old #82

NPM < v3 on Windows can't correctly restore the full dependency tree for packages like @angular/*.

If you use these Yeoman generators, you'll eventually end up with an error like:

ERROR in ./ClientApp/boot-client.ts
Module not found: Error: Cannot resolve module 'reflect-metadata' in C:\Users\stevesa\Desktop\spapacktest2\ClientApp
 @ ./ClientApp/boot-client.ts 4:0-27

The underlying cause is NPM not restoring the packages properly, and the solution is to update to NPM 3+. We should prevent things from getting this far by stopping the generator up front if you're on NPM < 3 on Windows.