parseComplete event now also supplies doclets

The parseComplete event only supplied plugins a list of files that
have been looked at before, now it also supplies the parsed doclets.

My use case is that I would like to be able to process some changes in the doclets after the initial parse and before post-processing. In our code we can almost always set a class's properties as a parameter, so we would like to create a 'toparam' tag which copies a property's description and type to the constructor's parameters. To do this I need to be able to modify the doclets object. I can't do this after post-processing, because another one of my plugins copies the parameters to other objects which inherit the constructor parameters.

I'm having some issues with writing the unit test though.

```javascript
spy.mostRecentCall.args[0].doclets
```

Gives an empty array in the unit test, (`{"sourcefiles":["[[string0]]"],"doclets":[]}`)
 but when I copy the string (`var bar = false;`) from the parseComplete unit test to a file and then run jsdoc with the eventDumper plugin I actually get an array with objects. 

```javascript
{
    "type": "parseComplete",
    "content": {
        "sourcefiles": "/home/eh/Documents/jsdoc/file.js",
        "doclets": "[object Object]"
    }
}
```