Add support for MSVC

[phoe]

While browsing the GitHub network for CCL, I found this commit from @denim2x. I think it would be worthy to review, test and merge it - posting it here so it is not forgotten in the sands of time.

TODO: one of the files in the pull request might contain LGPL code as a part of the Windows gettimeofday implementation. Example possible replacement that is licensed less liberally: https://stackoverflow.com/questions/1676036/what-should-i-use-to-replace-gettimeofday-on-windows

[eugeneia]

I checked this out today and it needed some changes to build, however the resulting kernel crashes with VirtualProtect spjump: 0x1e7 Attempt to access invalid address.

So... I think it’d need some work. I’d be interested to hear how far you got this @denim2x 👀

[xrme]

Thank you everyone for taking a look, but as #59 explains, we're going to give up (at least for now) on trying to use Microsoft tools to build the lisp kernel.