supporting c might be a good idea

go/linguaevalia/README.md

- `rust`
- `julia`
- `pixie`
- `c`
Adding more is relatively simple: If there is a command that runs code in
a language given a file, just add [the appropriate line](./linguaevalia.go#L40-L47)

go/linguaevalia/bin/run-c

#!/bin/sh
result=/tmp/`basename $1 .c`
cc $1 -o $result && $result
rm -f $result

go/linguaevalia/linguaevalia.go

var Rust = LanguageGeneral{"Rust", "rs", "./bin/run-rust", []string{}}
var Julia = LanguageGeneral{"Julia", "jl", "julia", []string{}}
var Pixie = LanguageGeneral{"Pixie", "pxi", "pixie-vm", []string{}}
var C = LanguageGeneral{"C", "c", "./bin/run-c", []string{}}
var languageMappings = map[string]Language{
	"go":         Go,
	"rust":       Rust,
	"julia":      Julia,
	"pixie":      Pixie,
	"c":          C,
}
func writeCode(code string, extension string) (*os.File, error) {