V0.8 go r59

this makes doozer compile with go r59. Two types of problems occured to me:

1.) some function signatures changed 
2.) the provided generated protobuffer files did not work for me, i.e. I removed `*.pb.go` files from the repository and added them to be removed when clean is called -- they get auto generated when `all.sh` is executed.

Problems:
--------------
    func (e response_Err) String() string {...}

was in the generated protobuffer file and in `err.go` (differently implemented). I removed it from `err.go` ... don't know if that is ok or not