New administrative UI

skeleton-v1.emr.ge now includes a completely redone /site-admin UI that is based on bootstrap and isolated from the site’s UI. It includes replacements for all scripts that used to be under /efs, /sysadmin, and /site-admin as well as a pluggable framework for downstream sites to add runnable administrative/developer “tasks” just by adding files to the site-tasks tree.

Big props to @akujin for getting the ball rolling with all the initial UI work and advancing the Git web UI.