Add 3gp -> mp3 conversion
Reorganize ogv file transformation
Use set -u in scripts and shx
With shx, we delete temp files
Add darx.sh script
Recover get.sh, which now is a good idea

Because we have shx that can abstract things and will soon have other
scripts that will need get funcionality.
Execute firefox as background job
Add deliverof.sh script
Move t_escape.sh to shx/tests/t_shx_escape.sh
Merge branch 'master' of ssh://red//disk/spare/gitroot/pub/scripts
Better if usage
Fix wrong program name in usage
Update shx
deliverof.sh is working, but testing is needed
Merge branch 'master' into deliver

Conflicts:
	shx
Dont' set -eu

Because shx already does that and we should not set -u before checking
"$@" (it can fail if the user passed no parameter).
Update shx.
Instead of see if $1 is empty check num of params

Also, update shx.