Merge pull request #71 from elliotchance/0.9.x/70-version

Adding version flag

main.go

@@ -15,8 +15,11 @@ import (
 	"github.com/elliotchance/c2go/program"
 )
 
+const Version = "0.9.3"
+
 var (
 	printAst = flag.Bool("print-ast", false, "Print AST before translated Go code.")
+	version  = flag.Bool("version", false, "Print the version and exit.")
 )
 
 func readAST(data []byte) []string {
@@ -203,6 +206,12 @@ func main() {
 	}
 	flag.Parse()
 
+	if *version {
+		// Simply print out the version and exit.
+		fmt.Println(Version)
+		return
+	}
+
 	if flag.NArg() < 1 {
 		flag.Usage()
 		os.Exit(1)