To get usage statistics of Sugar and GNOME, we add a log file in
/home/olpc/.olpc-launch-stats.

The chosen session is logged in olpc-session script and the shutdown is
logged with a new systemd service.

Use epoch time. Make the time the first column.

Using bash printf directly has better performance.

The feature is composed of:

- a Python daemon that uses Libwnck to listen windows changes and log
  the apps activation/deactivation

- a .desktop file that makes the daemon run at startup (only in GNOME)

- log apps start and end
- skip logging window changes within the same app
- a for was in need of a break

because pid is unreliable in wnck, get_pid() can return 0.

Also, cache the application name in the beginning because it can change
along the application life (there is a name-changed signal).

Otherwise the commands ifconfig and iwconfig can give translated output,
not suitable for the parsers.

Use same log, not print

the process should fork.

/usr/sbin is not in the path by default for NM scripts.

it was hanging until a timeout, similar to this bug:
https://bugzilla.gnome.org/show_bug.cgi?id=568320

and it was resolved the same way.

Once Nautilus starts in F18 or F14, the process does not exit and the
script is confused.

The log format is simplified. The script was logging too many details.

y eliminar el autoarrancador de GNOME.

El monitor pasa a usar eventos.

… Y Sugar