LibCecSharp: fixed - set the primary LA in CecLogicalAddresses

LibCecSharp: fixed - set the primary LA in CecLogicalAddresses
added GetLibInfo()/cec_get_lib_info() to the interface, that shows how libCEC was compiled and with which features included. added cec-client -i / cec-client --info
added ToString(cec_user_control_code_key) to the interface
added cecVersion to libcec_configuration, that configures the spec version that libCEC will use for devices it controls. defaults to v1.4
header cleanups, cleaned locks around callbacks, added CAdapterFactory, to create IAdapterCommunication instances, added --debug, --enable-optimisation
fixed: disallow sending CEC_OPCODE_SET_STREAM_PATH - not allowed by the CEC spec
fixed: when an image view source message was received from another device, then libCEC incorrectly marked that device as active source internally.
fixed: persist the configuration in the eeprom after initialising the client. fixes wrong/old settings being used in autonomous mode, which broke the wake on cec funtion
fixed: don't use a CTryLockObject in ReplaceHandler, but a standard lock and wait
fixed: unregister a registered client in RegisterClient() before requesting the vendorid, so the device members get reset. don't call ReplaceHander() another time, since GetVendorId() already doe$
fixed: don't try to write to the eeprom more than once within 30 seconds, and schedule another write if more than one change came in within the 30 seconds