lockdown: Add new LOCKDOWN_E_SERVICE_LIMIT error to detect service limit states
Improve maintainability and Requires of pkg-config file slightly
cython: Add new FILE_RELAY_E_PERMISSION_DENIED(-6) error to detect permission denied on iOS8+
cython: Add receive/receive_timeout methods for iDeviceConnection to receive data from a connection
Merge pull request #5 from upbit/cython