Move ipsproxy to pearson.brix.utils namespace

Also added a couple of IpsProxy typedefs
whitespace cleanup
move submit manager to pearson.brix.utils namespace
Remove unused answer key schema

Seann verified that both answer key schema's could be validated. We decided that the key as property name was somewhat more concise and faster, so we decided we would use that one. Therefore I removed the answerKey schema that used an array.