Track staff actions on organizations

[allanlasser]

Closes #529

Creates activity stream actions when staff make interventions onto organizations:

• inviting and removing members
• revoking invitations
• promoting and demoting admins
• updating subscriptions
• editing organization profile data
• accepting or rejecting profile changes

[duckduckgrayduck]

the log for removing a member is kind of weird
an example:
[sanjin removed member from organization plavender on HuffPost 0 minutes ago]

[duckduckgrayduck]

I edited the about section of the HuffPost organization and also made it public in the review app and neither events were logged

[allanlasser]

@duckduckgrayduck I've addressed your feedback! Now dispatching actions for any org profile editing done by staff. Ready for another look.

[duckduckgrayduck]

Functionally works- still may be some formatting in the logs we want to fiddle with, but ok to merge without. Example
user removed member x on y
could be user removed member x from y

[allanlasser]

Functionally works- still may be some formatting in the logs we want to fiddle with, but ok to merge without. Example user removed member x on y could be user removed member x from y

I definitely agree with you. I can't remember what affordances actstream provides for tailing the string output of an activity item, but feels within the realm of possibility to provide a template string when defining an action.