Support nodejs 0.6.0+ (including v0.10.0)

I tested node-qunit 0.5.15 on:
- nodejs v0.10.0
- nodejs v0.8.21
- nodejs v0.6.10

Passing without errors.


This fixes the following warning on npm-install:
```
npm WARN engine qunit@0.5.15: wanted: {"node":">=0.6.0 < 0.9.0"} (current: {"node":"v0.10.0","npm":"1.2.14"})
```

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Also fixed a missing space in the indentation of another object.