Use apm_package_url_from_key to find url of serach package instead ofnews_util_get_url which was changed to accept package_id to supportmultiple instances of news.
- Update Installer to require PG 7.2, since we are requiring it for 4.6- Added check for 7.3 saying it's not supported at the moment.- Removed check needed for 7.1, since it's not necessary for 7.2
changing message after package installation to reflect that server restart is no longer necessary. Caching if package is enabled after installation as is done in bootstrap.tcl