title: Error during installation of opencv in nodejs?
body: <pre>
  
  > opencv-build@0.0.15 install C:\projects\opencvtry\node_modules\opencv-build
  > node ./install.js
  
  info install if you want to use an own OpenCV installation set OPENCV4NODEJS_DISABLE_AUTOBUILD
  info install library dir does not exist: C:\projects\opencvtry\node_modules\opencv-build\opencv\build\lib\Release
  info install running install script...
  ERR! Error: Command failed: cmake --version
  'cmake' is not recognized as an internal or external command,
  operable program or batch file.
  
  npm WARN opencvtry@1.0.0 No repository field.
  
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! opencv-build@0.0.15 install: `node ./install.js`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the opencv-build@0.0.15 install script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  </pre>