EverythingMe/rainbow — pull request #2 by sstarcher (2014-07-09 11:10:12+00:00)
Title: Fails if the key is a non-string type

I have a mapping of

```
Mappings:
AWSRegion:
region:
64: "ami"
```

This causes the code to crash due to a startswith on the key of int(64)