Fixes comment https://github.com/adlnet/xAPI-Spec/issues/311#issuecomment-17246652
Fixes comment https://github.com/adlnet/xAPI-Spec/issues/311#issuecomment-17251171
Fixes comments https://github.com/adlnet/xAPI-Spec/issues/311#issuecomment-17252785 and https://github.com/adlnet/xAPI-Spec/issues/311#issuecomment-17302754
Merge pull request #371 from garemoko/formatting

Some formatting issues