rebuild script manages rebuild of civicrm_stats database from civicrm_stats_raw
cleaned up routing
we don't need SiteRepository.php
updating entities
creating a sites route
sites controller gives reasonably accurate stats for active sites and some summary stats, like version, cms, mysql+php version etc.
updated packages with composer
when populating ping table, ensure they are sorted by date so that we can easily identify latest ping
more helping message for rebuild
this script creates latest and active columns to enable us to ask questions of the stats more easily
rewrite Site entity since some of the getters and setters were mucked up