Option to create a group for active indirect membership

[astrochun]

Currently, user_update directly add members to figshare:active.

Moving forward, figshare:active should only had indirect membership. The direct membership makes it complicated. With new groups being added, it's perhaps better to create a new group that has those members directly and to indirectly add that group in figshare:active. This is best as an interactive prompt option that adds for the names, etc.

• Re-purpose add_groups function to create_groups and have it outside of add_grouper_groups script [3def1a5, e3ca412]

• Create a function called create_active_group to enable creating such a group in figtest:group_active stem [d501e26]

• Add option in user_update to use create_active_group and add members [bd937dc]

• Note that this is related to Ability to run script_run with a limited set #65 as the limited use should also consider adding active members by at least creating the group and adding them there.