Remove application; it's now part of the settings app

Signed-off-by: Simon Busch <morphis@gravedo.de>
Implement the other part of the system update

* running the update will reboot the device into the system update mode (see
  http://freedesktop.org/wiki/Software/systemd/SystemUpdates/)
* in system update mode the run-update.sh script is executed through the systemd service
  and updates all previously downloaded packages

Signed-off-by: Simon Busch <morphis@gravedo.de>
spawn child will not throw error if child finishes with error

but it will still transport possible error codes.
added error parsing methods to parser.
improved error messages that are sent to app
added parameter to skip feeds update
removed .gitignore from repository.
Merge branch 'master' of https://github.com/webOS-ports/org.webosports.update
Merge branch 'garfonso/work'