Added the email field to "Group".
HTML part for tabulator is done.
Modifying checkboxes works now.
Setting a sensible default for "group.cancelled".
Table name no longer hard-coded.
Text fields are mostly working as well now.
Using proper text-content instead of innerHTML.
Handling empty cells better.
Merge branch 'tabularadmin' into develop
Merge branch 'develop' of https://github.com/exhuma/lost-tracker into develop
finalized column added for a group
correction for get_user
accept_registration function added