Remove rules about when profiles can be deleted

- We no longer need to force the user to remove
a person from their groups before deleting their
profile.
No more organisations, all groups are teams

- The only reference to organisation is on the 
home page 'organisational structure' browser.

- Removed the translations for groups as we no 
longer need this level of abstraction.
Remove 'people' actions from the group edit pages

- We no longer manage memberships or link to add 
new people from the group pages
Update membership field titles

- Title becomes Job title
- Group becomes Team