Do not repeat code whenever possible

Signed-off-by: Shin'ya Minazuki <shinyoukai@laidback.moe>

config.go

@@ -1,6 +1,8 @@
 package mikuru
 
 import (
+	"log"
+	"os"
 	"gopkg.in/ini.v1"
 )
 
@@ -9,6 +11,16 @@ var Config struct {
 	Token string
 }
 
+func ConfInit() {
+	config, err := os.UserConfigDir()
+        if err != nil {
+                log.Println("Unable to obtain user's configuration directory")
+                log.Fatal(err)
+        }
+        configPath := config + "/mikuru.ini"
+        Parse(configPath)
+}
+
 func Parse(file string) error {
 	cfg, err := ini.Load(file)
 	if err != nil {