saving ram:
- reduce main statck size
- reduce remote alias cache size
- remove watchdog
Reduces verbosity of logging.
Swtiches M61 from dcc to marklin protocol.
remove unnecessary verbose warning.
Merge branch 'newmaster' of github.com:balazsracz/openmrn_cue into newmaster

Conflicts:
	cs/mobilestation/MobileStationTraction.cxx
Fixes packet queue for asynchronous fd.