Added actinia_core installer
Added actinia_core installer

actinia_core (https://github.com/mundialis/actinia_core) is an OSGeo community project.
This PR proposes an installer script.

OSGeo/OSGeoLive,astroidex/OSGeoLive,kalxas/OSGeoLive,OSGeo/OSGeoLive,kalxas/OSGeoLive,OSGeo/OSGeoLive,astroidex/OSGeoLive,astroidex/OSGeoLive,OSGeo/OSGeoLive,astroidex/OSGeoLive,astroidex/OSGeoLive,OSGeo/OSGeoLive,kalxas/OSGeoLive,kalxas/OSGeoLive,kalxas/OSGeoLive,OSGeo/OSGeoLive,OSGeo/OSGeoLive,kalxas/OSGeoLive,astroidex/OSGeoLive,kalxas/OSGeoLive