WIP Custom windows

With these changes I can build and run mixxx on my local machine I have sound and all tests are passing. 
I do build without ASIO currently. 

chromaprint
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cmake also needed to know where to find the fftw3 headers and `FFTW3_FFTW_LIBRARY` has to point to a `*.lib` file

taglib
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taglib was pretty straight forward to change the solution on the fly. But I also edited the `xcopy` commands to overwrite the old files always. This was a bit annoying with rebuilds. Is there a special reason why you used `xcopy` over `copy`?

portaudio
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The default solution you use is configured to use ASIO. I can also use cmake here to generate a solution and disable ASIO. But I had to edit the CMakeList.txt to add a preprocessor definition `PA_WDMKS_NO_KSGUID_LIB`. If this is not set the build just doesn't work. It is also documented in the PA sources and activated in the solution shipped with PA but there was no way to this in cmake from the CLI. At least I haven't found one. The build script will currently only copy the .lib and .dll files for amd64. I haven't checked what happens if I build i386 binaries.


This works quite fine for me and it doesn't matter which folder I use. I also tried editing the existing solutions to use relative paths but couldn't get it running.

This won't link since the .lib has the name portaudio_%PLATFORM%.dll baked into it.