Doesn't support a valid yml file

[jsloyer]

I am trying to use this library in my node app and its complaining about the following yaml and saying the indention is invalid.

---
applications:
- name: phpinfo
  memory: 128M

The error I am getting is:

hash not properly dedented, near "\n memory: 128M\n

This is the style of yaml file's that CloudFoundry uses.

[jsloyer]

It looks like this is related to #26, but my file is spaces not tabs.