LTOBD2Adapter: allow leading dots in PID line (only in some states)
LTOBD2Adapter: allow leading dots in PID line (only in some states)

During adapter<->vehicle protocol negotiation phase,
an adapter might return a "contaminated" PID line, e.g.:
"SEARCHING...\r...48 6B 1A 41 00 88 18"
To facilitate compatibility with such adapters, we are ignoring leading dots.
Note that after a successful connection has been made, this is no longer acceptable.

Closes #8 (github)

mickeyl/LTSupportAutomotive