Decorate not found

Hi, I was trying out the library, but I get the following error when doing the section "Capturing runtime information":

```bash
> library(testr)
> Decorate("any")
Error in Decorate("any") : could not find function "Decorate"
```

Is the documentation out of date or am I missing something?

I'm working on a Mac OS X (Sierra) and the installation went ok :o 