Dub package support

Currently I'm working on DOOGLE and a dependency is Windows api bindings.
I've already tried getting dub to play nicely with git submodules (failed).

Here is a dub package file to get it to compile.
I've also added import libs which will be used when building for Windows 32bit.
To make it work out of the box.

I won't add it to the dub repository however.

The import libs are very hackish but they do work for compilation purposes.