Merge remote-tracking branch 'origin/fix_default_size' into seedsman
changed: remove £250 limit from ISF shipping
changed: allow airmail only for brazil, canada and australia.
changed: removed insurance text from special delivery methods
changed: remove France from allowed Airsure destinations due to problems with tracking
added: no guaranteed delivery text to airmail
changed: allow airmail delivery to Israel
Merge remote-tracking branch 'origin/seedsman' into seedsman