TODO list
---------

* Track maemo-launcher worker childs as well on the kindergarten.
* Implement an --exec option to maemo-invoker to just exec and not
  dlopen apps.
* Pass environment from maemo-invoker to the launcher?
* Remove acks in IPC.
* Rework IPC system to pack the commands and send them at once.
* Fix properly the need to send the filename first in the protocol, and
  to send the pid from the child.
* Put the socket in the proper dir.
* Pass the stdio descriptors from the invoker to the launcher and
  connect them?
* Make the invoker handle non absolute pathnames.

