* Changed `Load` to `Unmarshal`
* made `Marshal` and `Unmarshal` into methods of `COF`
* added `New` function which creates a new, empty COF instance
* added helper functions `Marshal` and `Unmarshal`
* Changed `StreamReader.ReadBytes` to account for edge case of reading 0
bytes (this was returning an error when it should not have)
* added really simple unit tests for COF
