Feat/reorganize code

Let's use a more structured folder system: https://github.com/golang-standards/project-layout

• Resolves: #99 (closed)

cmd/bitmask-connect/main.go

@@ -16,6 +16,7 @@
 package main
 
 import (
+	"flag"
 	"fmt"
 	"log"
 	"os"
@@ -34,26 +35,14 @@ const (
 var version string
 
 func main() {
-	if len(os.Args) <= 1 {
-		help()
-		os.Exit(1)
-	}
+	displayVersion := flag.Bool("version", false, "Display the version")
+	flag.Parse()
 
-	switch os.Args[1] {
-	case "connect":
-		start()
-	case "version":
+	if *displayVersion {
 		fmt.Println(version)
-	default:
-		help()
+		os.Exit(0)
 	}
-}
-
-func help() {
-	fmt.Println(`Bitmask VPN - commands:
-	help    - Displays this help
-	connect - Connects to the VPN (stops by ctrl-c)
-	version - Displays the version`)
+	start()
 }
 
 func start() {