Adding support for Martini & Goji frameworks - Go

Adding benchmark support for Martini & Goji, two web frameworks for Go.

See: 
   - http://martini.codegangsta.io
   - https://github.com/go-martini/martini
   - https://github.com/zenazn/goji
   - https://goji.io
Please remove this line, and add a file `bash_profile.sh` to the martini directory. See [this example](https://github.com/TechEmpower/FrameworkBenchmarks/blob/master/go/bash_profile.sh) for the go directory