Cannot pass a root dir other than __dirname
I am using `koa-views` with `ejs`. I want to put my ejs templates in the views folder in the root dir of my project. When I do this I get an error message saying 
`{ [Error: ENOENT: no such file or directory, open '/Users/isik/Dev/atelye/masteringtrolls/questions.ejs']
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: '/Users/isik/Dev/atelye/masteringtrolls/questions.ejs' }
`

Actually I see the path stated is incorrect since I wrote it to be in views:
`app.use(views(__dirname + '/views', {
  map: {
    ejs: 'ejs'
  }
}));
`
Is that a bug?
