Removed unused import in sipsimple.applications.presrules

Ignore-this: 6e4f83810af1d264123f6d5f3c5ab234

darcs-hash:20090329235108-1e3d8-29b6f1b67fc26890e98e8ba20736b26a78a8e192
Fixed typo in SettingsObject

Ignore-this: 5528ceb58e2922ee2157657b2fbb6048

darcs-hash:20090329235157-1e3d8-b1e64973f4694fc02acf1b1414e166e55a12eb52