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/gamepad_daemon

@@ -1,7 +1,7 @@
-#!/bin/sh
-P=$HOME
+#!/usr/bin/env sh
+
 sudo xboxdrv --silent \
-     -c $P/.config/xboxdrv/general.xboxdrv \
-     --alt-config $P/.config/xboxdrv/typing.xboxdrv \
-     --alt-config $P/.config/xboxdrv/media.xboxdrv \
+     -c $HOME/.config/xboxdrv/general.xboxdrv \
+     --alt-config $HOME/.config/xboxdrv/typing.xboxdrv \
+     --alt-config $HOME/.config/xboxdrv/media.xboxdrv \
      --axis-sensitivity X1=-1.0,X2=-1.0,Y1=-1.0,Y2=-1.0