This patch adds table profiles_accounts with the next columns:
 - profile_id INTEGER NOT NULL
 - account_id TEXT NOT NULL
 - is_account TEXT

This table links profiles with account id. It allows find profile for
account by account id. For contacts we still using uri.

Gitlab: #368
Change-Id: Ib789705a45d1583dde18ccf04e117868f54a3660
Reviewed-by: Sebastien Blin <sebastien.blin@savoirfairelinux.com>