Version 0.18.3: Added more MME encoding and decoding, RLC UMD header extension support, and higher order modulation scheme support to PHY in the LTE library, split the error enum into common.h, moved to a new message queue using semaphores and circular buffers, added IP PCAP support, split UL/DL QoS TTI frequency, added user reset to RB class, added RLC UMD multiple data support, added UTC timestamps to the debug log port, added higher order modulation scheme support in MAC, fixed C-RNTI assign/release management, changed RTS timing, fixed user switch in MME/RRC, added clear RB support and fixed copy RB in the user class for LTE_fdd_enodeb.