State S3 of SoM completed in order to be able to establish a communication session in the state A31.
OpenRBCSession completely implemented.
Euroradio connection establishment: some paragraphs splitted + implemented
First try of implementing RBC state machine
Added missing traceability link
§3.5.3.7.a.1 is implemented
Euroradio state machine implementation continued
Merge branch 'OpenETCS/master'

Conflicts:
	ErtmsFormalSpecs/doc/specs/subset-026/EURORADIO.efs_ns
Implemented reception of system version
Corrections after replacing the enum representing the current state a state machine in RBCStruct
Corrected procedure name
Corrected scopes of paragraphs
Implemented a part of Euroradio session termination
Implementation of CloseRBC()
Tests corrected after changes in CloseRBCSession()