merge files into one for further work

All files with backup tool like code are merged into one file.  Every original
file is put into a provisional function.
backup.sh: add idea for backup script with git
backup.sh: Add global variables
start incremental version

Only a minimal version which is still untested.
secure.sh: use environment if present
Merge branch 'feature/backup' into devel

Version 0.1 of the incremental backup.sh script (inspired by rsnapshot and
Time Tachine.app).
add script to display word count for a file in every ref
Adjust gitignore to new global settings.
Rewrite secure.sh for OS X native encryption.
Fix bugs in copy-music.py.
Update makefile and remove dead code.

Improve linking rule and remove old versions thereof.  Add new files including
external system binaries to link to ~/bin.
Add return value to stop launchd from relaunching script.
Remove dependency on global variables.
Use dynamic code to easily link mac system binaries to ~/bin.
Refactor makefile and remove link.
Refactor lock script.
Update mail scripts.
Add new python script for internet search (obsolete).

These scripts are now obsolete since I found
http://surfraw.alioth.debian.org/.
I still want to commit some of my work from this script over there.
Remove globally installed script.
Make lock script cross platform.