TypeError: Cannot read property 'content' of undefined`

We are constantly getting this error when trying to run aglio (we run it as a server, but it also happen when output goes to a file):

```
$ aglio -i sample.apib.md -s -p 9876
Server started on http://127.0.0.1:9876/
Rendering sample.apib.md
/Users/amuino/.nvm/versions/node/v5.6.0/lib/node_modules/aglio/node_modules/aglio-theme-olio/lib/main.js:387
ref = api.content || [];
^

TypeError: Cannot read property 'content' of undefined
at decorate (/Users/amuino/.nvm/versions/node/v5.6.0/lib/node_modules/aglio/node_modules/aglio-theme-olio/lib/main.js:387:14)
at Object.exports.render (/Users/amuino/.nvm/versions/node/v5.6.0/lib/node_modules/aglio/node_modules/aglio-theme-olio/lib/main.js:645:5)
at /Users/amuino/.nvm/versions/node/v5.6.0/lib/node_modules/aglio/lib/main.js:133:20
```

I've attached the minimal test case input file (zipped so that Github will allow me):
[sample.apib.md.zip](https://github.com/danielgtaylor/aglio/files/144166/sample.apib.md.zip)

The error disappears when any of this happens:
- Rename data structure `Booking State Params`. Not all renames work (seems like inserting/appending chars to the last word does not fix the issue)
- Renaming data structure `Booking State Response` so that it does not match the name in Attributes (gives a nice format error)
- Removing any `O*` data structure
- Making `Point` an object instead of an array
- Removing the reference to `Booking State Response` from the Response (any `O*` seems to work, probably because it does not reference `Point`)

Versions:

```
$ aglio -v
aglio 2.2.0
olio 1.6.2
$ node -v
v5.6.0
$ npm -v
3.6.0
```