installing without make

[idavydov]

Hi, Starting from Go 1.7, Cgo supports Fortran. I created a version which can be installed without make idavydov/go-lbfgsb@058cdc0160493214a0fc9a95c34cb6a24550f7e5. For old Go versions you can still use make, for Go 1.7 or later you can install with

go get github.com/idavydov/go-lbfgsb

If you are interested, I can create a pull request for your master branch.