Some work on Scripts

notable changes:
- rename `bt-connect` to `bt_connect`
- rename `music` to `media` and make it generic instead of checking
  Spotify
- make separate script to set background to a preset black image
- make all shebangs "#!/usr/bin/env sh"

Scripts/.local/scripts/emoticons

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env sh
 
 response=$(cat $HOME/.local/share/emoticons.txt | dmenu -F -i)
 emoticon=$(echo $response | sed 's/\w+//gi' | awk '{print $1}')