Update install_udig.sh
Update install_udig.sh

cp Walkthrough 1 + 2 to docs folder
kalxas/OSGeoLive,kalxas/OSGeoLive,kalxas/OSGeoLive,OSGeo/OSGeoLive,astroidex/OSGeoLive,kalxas/OSGeoLive,OSGeo/OSGeoLive,astroidex/OSGeoLive,OSGeo/OSGeoLive,OSGeo/OSGeoLive,OSGeo/OSGeoLive,OSGeo/OSGeoLive,OSGeo/OSGeoLive,astroidex/OSGeoLive,kalxas/OSGeoLive,kalxas/OSGeoLive,astroidex/OSGeoLive,kalxas/OSGeoLive,astroidex/OSGeoLive,astroidex/OSGeoLive