Add new languages

[andredias]

Go, Rust, Javascript, SQL(ite)

See https://github.com/engineer-man/piston/tree/master/packages It contains examples of language installations.

[andredias]

Rust needs much more memory than Python. At least 325MiB to run a simple hello world.

[andredias]

Rust has been installed in 6e3a42e. SQLite in 8162c23