* firmware: remove TCH/F specific bit re-ordering
* mobile: do not enforce RTP format for Uplink TCH frames
* mobile: support RTP and TI specific TCH frame I/O formats
* trx_toolkit/fake_trx.py: basic TRXD version 0x01 support
* trx_toolkit/rand_burst_gen.py: use TrainingSeqGMSK and BurstType enums
* trx_toolkit/gsm_shared.py: introduce a new enum TrainingSeqGMSK
* trx_toolkit/data_msg.py: legacy flag is only for version 0x00
* trx_toolkit/data_msg.py: introduce header coding version 0x01
* trx_toolkit/data_msg.py: implement header version coding