copy-music.sh: add more functions for future expansion
copy-music.sh: more complex loop
copy-music.sh add traps and comments
copy-music: add makefile and helper scripts

Add code from a seperated start (in another directory) to the repository.
copy-music: final makefile from outside directory
copy-music.sh: expand script
copy-music.py: try to implement the idea in python
fixperm.sh: add more extended attributes and ACL
new script to collect metadata from a music dir
many files mode change
new file mute.scpt
merge all OS X muting scripts into volume.scpt
complete battery.py

The script battery.py now has approximately the same features as the original
battery.sh.
delete battery.pl
remove useless README file
remove old music scripts

merging useful code into python script as possible
Merge branches 'battery', 'music' and 'restucture'

Pull intermediate changes from other branches.
pdfcrack.sh: handle signals with traps