Added missing import in sipsimple.account

Ignore-this: 39ca942965a1b3ba79d9c1e774c408d1

darcs-hash:20090319142402-1e3d8-976ef8dd6d13eabad11ae07259f66321c5aef72f
Fixed handling of bonjour account after id change

Ignore-this: 69c70416617e3590d00858062168836c

darcs-hash:20090319143640-1e3d8-ebfc1aa7276128940a18a1c4b5483443c78c61ed