HELP sms fixed, FAULT sms added

SMS command "HELP" fixed. Function net_send_sms_start(caller) added to
the _help_sms part and premsg is ignored
;           "HELP" returns "STAT DEBUG FAULT HELP"
;         - Hook vehicle_thinkcity_ticker1 modified to
vehicle_thinkcity_state_ticker1
;         - Detection of charge state and door1 moved to state_ticker
vehicle_thinkcity_state_ticker10
;         - Chargemode is always 0 (standard charge) and is moved to
state_ticker1
;         - New Think City specific parameters added.
;         - SMS handler for "FAULT" added. Errors, warnings and
notification are grouped, but there is no logic in selecting activ ones
yet.