[Blocked] Committee meeting attendees support

[RavivBarzilay]

part of hasadna/knesset-data#143

• added CommitteeMeetingAttendee model which will store textual parsing result of committee meeting attendees

[OriHoch]

I think some more testing is needed before merging
specifically, to test the other parts of this issue in knesset-data-django hasadna/knesset-data-django#13 - and see if any more changes might be needed for the model

[alonisser]

Data migration? tests? public api? unicode methods? Without tests this would contribute to technical debt. without public api, not sure what's the use.. And how are the attendants actually added?

Also adding an attendee that is just a text "name" and text "role" and not a Person, is quite problematic in my view. Would be added with different names, no option to add aggregation functionality on a specific person attending. etc..

[OriHoch]

@alonisser - the goal for this is to have data available via re:dash

if you prefer we can also add it in a different module under knesset-data-django, not as part of open-knesset

but, in this case, due to the relationship with committee meeting it made sense to keep it here

[alonisser]

No problem with keeping it here. Although I do prefer build views or at least an api as an extension task.. redash is very specific.
My main problem is saving Queryable data as a text field Instead of a foreign key to an entity