WiP commit, code blocked on matching of person to speaker
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.
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'