add album-pic and lyric download
add mutagen module for image in mp3 file. auto merge lyrics,album art,album name,artist name,music title into the mp3 file
remove debug message
Merge branch 'fooling-master'

TODO: Fix issues listed in comment section of issue #1
[Fix]: Merging aftermath: Fix Unicode Error.
[Mod]: Merging aftermath: Make mutagen optdep.
[Ref]: Merging aftermath: Make tagging seperate.