Add redirect for start.hackmit.org

[Detry322]

Create a redirect for http://start.hackmit.org and all associated pages, so that it redirects to the relevant page on http://starthacking.org

[anishathalye]

I don't think it makes sense to special case this just for start.hackmit.org.

It's probably cleaner to do something like a 302 redirect start.hackmit.org to starthacking.org. That seems like the right way to implement this.

To see what this looks like, as an example, you can try curl -I anishathalye.com (which redirects to www.).