update core files to 4.2.8, part 1 (api, CRM, css, misc)
update core files to 4.2.8, part 2 (packages, etc.)
update core files to 4.2.8, part 3 (additions)
update core files to 4.2.8, part 4 (deletions)
update override files to 4.2.8, part 1 (CRM through Contact)
update override files to 4.2.8, part 2 (CRM through Mailing)
update override files to 4.2.8, part 3 (CRM through end)
update override files to 4.2.8, part 4 (tpl files)