Change error passing to add context

[alexbeltran]

Currently all errors are simply passed. Adding a little bit of context as we pass it up the chain will help with debugging.

i.e.

_, err := os.Create()
if err != nil{
    return fmt.Errof("unable to create file: %v")
}

instead of

_, err := os.Create()
if err != nil{
    return err
}

This would be useful when passing up the chain since there are multiple stages and packages used for each command called. An example would be an error in the encoding portion could give additional context in the net layer so we know at what point it fails.