Changelog for package launch_tools

Forthcoming

• preparing for indigo. changed prints for ros logs
• added gps_to_std_gt and services_timer from fuerte
• hydro catkinization changes
• catched exception on xml parse error
• added python setup files and wet'ed plot tools
• wet repo
• added params for stdout and stderr files
• new node that executes a command
• changed manifests
• added BSD license
• added launchViz and launch_tools package
• Contributors: Miquel Massot, Stephan Wirth