appveyor CUDA support

- install CUDA
- compile miner with CUDA and OpenCL

.appveyor.yml

@@ -1,5 +1,5 @@
 # image
-image: Visual Studio 2017
+image: Visual Studio 2015
 
 # build platform
 platform: x64
@@ -11,17 +11,18 @@ install:
   - mkdir c:\xmr-stak-dep
   - curl -sL https://github.com/fireice-uk/xmr-stak-dep/releases/download/v1/xmr-stak-dep.zip -o xmr-stak-dep.zip
   - 7z x xmr-stak-dep.zip -o"c:\xmr-stak-dep" -y > nul
+  - call "c:\xmr-stak\CI\appveyor\install_cuda.bat"
 
 build_script:
   - call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\Tools\VsMSBuildCmd.bat"
   - cd c:\xmr-stak
   - mkdir build
   - cd build
   - set CMAKE_PREFIX_PATH=C:\xmr-stak-dep\hwloc;C:\xmr-stak-dep\libmicrohttpd;C:\xmr-stak-dep\openssl;
-  - cmake -G "Visual Studio 15 2017 Win64" -T v140,host=x64 -DCUDA_ENABLE=OFF -DOpenCL_ENABLE=OFF ..
+  - cmake -G "Visual Studio 15 2017 Win64" -T v140,host=x64 .. -DWIN_UAC=OFF
   - cmake --build . --config Release --target install
 
 test_script:
   - cd c:\xmr-stak\build\bin\Release
   - dir
-#  - xmr-stak.exe
+  - xmr-stak.exe --help

CI/appveyor/install_cuda.bat

@@ -0,0 +1,11 @@
+@echo off
+tree "C:\Program Files (x86)\"
+echo Downloading CUDA 8
+appveyor DownloadFile  https://developer.nvidia.com/compute/cuda/8.0/prod/local_installers/cuda_8.0.44_windows-exe -FileName cuda_8.0.44_windows.exe
+echo Installing CUDA 8
+cuda_8.0.44_windows.exe -s compiler_8.0 cudart_8.0
+set PATH=%ProgramFiles%\NVIDIA GPU Computing Toolkit\CUDA\v8.0\bin;%ProgramFiles%\NVIDIA GPU Computing Toolkit\CUDA\v8.0\libnvvp;%PATH%
+dir "C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA"
+dir "C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v8.0"
+dir "C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v8.0\bin"
+nvcc -V