refactor CommonCommand structure -> more memory efficient.
re-design OBD connections to use two asynchronous I and O threads.
return to sequential execution for classic obd adpaters
Merge pull request #3 from enviroCar/develop

Develop
set FileWriter mode to !append. fixes #137
reflect changes in enviroCar-app response validation.
add more support for drivedeck.

responses are now converted to OBD-protocol raw data, to reuse parsing.
Merge pull request #156 from matthesrieke/develop

new drivedeck stuff