Add the possibility to get stats for eol'd collections at /packager/stats/
Add an eol argument to filter or not on eol'd collection on get_package_of_user and get_package_watch_by_user
Expose the eol argument in the internal API

Update get_package_watch and get_package_maintained methods so that
the results returned include eol'd branches or not
Add the possibility to include the ACLs of EOL'd collections on the packager's page

Fixes https://fedorahosted.org/pkgdb2/ticket/15