Fixes CFPropertyList errors

V 2.2.0 would crash Siriproxy after the mic button was pressed, this forces it to use version 2.1.2.
Fix for #143

https://github.com/plamoni/SiriProxy/issues/143#issuecomment-12238537
Solves the "two commands after another" error.
Merge branch 'master' of https://github.com/Deanmv/SiriProxy