Implemented reception of session management packet from the RBC
Function renamed + traceability
Implementation of requirements on termination of communication session
Added some traceability links
Messages received after Termination of communication session message are ignored.
Implementation of termination of the communication session continued
Merge branch 'OpenETCS/master'
Implementation of registering of mobile terminals
Merge branch 'OpenETCS/master'
Merge branch 'OpenETCS/master'
Some warnings/info messages corrected
Merge branch 'OpenETCS/master'
Merge branch 'OpenETCS/master'

Conflicts:
	ErtmsFormalSpecs/doc/specs/subset-026/BTM.efs_ns
Merge branch 'OpenETCS/master'
Some scope flags are saved in the new format
Revision of implementation of SystemVersion
Merge branch 'OpenETCS/master'
Corrected SystemVersion for RBC/RIU
Handling of warnings/info messages.
Correction of warnings + info messages + implementation of system versions supported by the on-board.