Making a config package for Generating keymappings

Following changes have been made:
    1. Moving the getMusicDirectory() to config package
    2. Moving the config.go to config package
    3. Generating a Function Map that will be used for Generating keymappings in main.go
    4. Using the config packge in main.go
    5. First we are reading the user configuration values with
       config.ReadConfig() and then we are reading the mappings with
       config.ReadMappings() with the help of Function Map that is
       generated.

utils.go

@@ -1,8 +1,6 @@
 package main
 
 import (
-	"fmt"
-	"io/ioutil"
 	"strconv"
 	"strings"
 	"syscall"
@@ -82,27 +80,3 @@ func formatString(a interface{}) string {
 		return "Paused"
 	}
 }
-
-func getMusicDirectory() string {
-	content, err := ioutil.ReadFile(HOME_DIR + "/.config/mpd/mpd.conf")
-	if err != nil {
-		fmt.Println("No Config File for mpd Found")
-		panic(err)
-	}
-	ab := string(content)
-	maps := strings.Split(ab, "\n")
-	for _, j := range maps {
-		if strings.Contains(j, "music_directory") {
-			s := strings.SplitAfter(strings.ReplaceAll(j, " ", ""), "y")[1]
-			s = strings.ReplaceAll(s, "\t", "")
-			d := ""
-			for z, m := range s {
-				if (z != 0) && (z != (len(s) - 1)) {
-					d += string(m)
-				}
-			}
-			return d
-		}
-	}
-	return ""
-}