Fix lib dependency in main.go

Author: Edouard Maffert

main.go

@@ -6,8 +6,8 @@ import (
 
 	cli "github.com/urfave/cli"
 
+	"github.com/af83/gin/lib"
 	"github.com/codegangsta/envy/lib"
-	"github.com/codegangsta/gin/lib"
 
 	"log"
 	"os"