maybe better tell people about the key binding

go/linguaevalia/README.md

@@ -10,7 +10,8 @@ Just write the code.
* `go get github.com/heyLu/lp/go/linguaevalia`
* `$GOPATH/bin/linguaevalia`
* visit <http://localhost:8000> and start writing code
* visit <http://localhost:8000> and start writing code (press `ctrl-enter`
    to run the code)
Essentially just need `go`, but to run code in other languages, you need
to have them installed as well.