Don't show committee membership on people profiles for SA

Closes #865
Remove comments from organisations and replace with feedback form

Closes #854
Include National Executive positions in person positions

Closes #865
WiP commit, code blocked on matching of person to speaker
[SA] Fix formatting on place_places page
[SA] Link to constituency office org page on place page

Closes #857
Fix import script to --delete-old identifiers
Extract get_sayit_speaker (stub)
implement get_sayit_speaker
Tests for #874 speaker resolution wip

Test code untested (natch) as can't run south_africa tests on dev
instance, checking into branch to pick up tomorrow.
Fix test for change in bbfd7ee.
More usual setup for staticfiles for debug/test.
Various little fixes to get the tests running (but not passing)
Fixed SADetail person->speaker resolution test

pairing with evdb
Link sayit person to ZA person detail page
Merge branch 'issues/870-display-speeches-for-person'