go get failed under ubuntu .

hi, all

following the ReadMe guide , I run  go get command , but failed:

```
go get github.com/zacg/simplelib
can't build package github.com/zacg/simplelib because it contains C++ files (simpleclass.cpp) but it's not using cgo nor SWIG
```

my env:

```
go version
go version go1.7.1 linux/amd64
```

any suggestions?

thanks.
