make the temp folder in an actual temp location

[SheetJSDev]

I installed textract:

$ sudo npm install -g textract

Every invocation of textract seems to fail:

$ textract -h

fs.js:647
  return binding.mkdir(pathModule._makeLong(path),
                 ^
Error: EACCES, permission denied '/usr/local/lib/node_modules/textract/lib/extractors/temp'
    at Object.fs.mkdirSync (fs.js:647:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/textract/lib/extractors/images.js:83:8)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at module.exports (/usr/local/lib/node_modules/textract/lib/extract.js:85:10)
    at Array.map (native)

This happens on OSX because the module was installed as root but invoked as a normal user. On linux and osx the temp folder should probably be a proper temporary directory in a location like /tmp