MakeDrive Images

https://dl.dropboxusercontent.com/spa/n5v3bx9nnjkdpzf/dutkm41m.png

This is my initial commit on `/images` PR. I think the server side code is ready for ready, but for client I will probably talk to Matthew or Ricardo this Tuesday and get some feedback on the current design.
Do something like this (i.e., manage the list in this function vs. passing it in).  Always better to have functions return data vs. modify external data.

```js
function getContent(data, currentPath) {
  var list = [];
  data.forEach(function(content, index) {
    if (content.type === 'DIRECTORY' && content.contents) {
      list.concat(getContent(content.contents, list, Path.join(currentPath, content.path)));
    }
    if (content.type !== 'DIRECTORY' &&
        mime.lookup(Path.join(currentPath, content.path)).indexOf('image') !== -1) {
      list.push(Path.join('/p', currentPath, content.path));
    }
  });
  return list;
}
```