IHWSubmissionSet.search should be available in the API

Fixed in db-stable r10711 <http://bazaar.launchpad.net/~launchpad-pqm/launchpad/db-stable/revision/10711>.

Looks good, tested with the following script:

#!/usr/bin/env python

from datetime import (
    datetime,
    timedelta,
    )

import lazr.restful
from launchpadlib.launchpad import Launchpad

LAUNCHPAD_RESULTS_SERVICE_ROOT = "https://api.qastaging.launchpad.net/"
launchpad = Launchpad.login_with("Launchpad Project", LAUNCHPAD_RESULTS_SERVICE_ROOT)
hwdb = launchpad.load('%s+hwdb' % launchpad._root_uri)

print "Submissions created in the last 15 days"
now = datetime.now()
ago = now - timedelta(days=15)
for submission in hwdb.search(created_before=now, created_after=ago):
    print submission.date_created

print "Submissions created in the 15 days before"
now = ago
ago = now - timedelta(days=15)
for submission in hwdb.search(created_before=now, created_after=ago):
    print submission.date_created

print "Make sure the dates are within the range and they don't overlap"