core (memory/sqlite): better stability: - timeout increased to 15 s - if a query fail, it's retried up to 5 times - foreign key PRAGMA is executed on every new connection object (should fix non working foreign keys) those are Q&D workarounds for issues with Sqlite, before switching to a higher level module to handle it correctly.

# FIXME: remove this when RSM and MAM are in wokkel
# XXX: the Monkey Patch is here and not in src/__init__ to avoir issues with pyjamas compilation
import wokkel
from sat.tmp.wokkel import pubsub as tmp_pubsub, rsm as tmp_rsm, mam as tmp_mam
wokkel.pubsub = tmp_pubsub
wokkel.rsm = tmp_rsm
wokkel.mam = tmp_mam