Clearly document ownership of received usbmux packets.
Release processed response packets that get discarded.
Release received packets that aren't saved in the response list.
Fix crash due to double-free of AMDeviceRef in finalize implementation
Fix potential crash when AMDeviceRef finalize is called due to previously released but not NULL'd ivar
Fixed leaked AMDeviceRef in attach callback
Fixed leak of temporary AMDeviceRef created for comparison purposes when listing
Fixed leak of AMDeviceRef's lockdown_conn ivar
Merge pull request #55 from JeremyAgost/usbmux-amdevice-caulk

Fixing leaks in USBMux packet handling and AMDeviceRef lifecycle