Volkswagen MQB platform DBC updates (commaai#167)

* Add new messages from VW MQB fork

Adds and fleshes out the critical HCA_01, LDW_02, and EPS_01 messages needed to make the VW MQB port work. Adds VW authoritative names for several other CAN messages discovered during testing.

* Delete vw_mqb_2010.dbc.txt

* Add new messages from VW MQB port

Adding documentation for certain critical CAN messages: EPS_01 (steering rack outputs), LDW_02 (lane departure warning cluster feedback), and HCA_01 (heading control assist, steering torque commands from the LKAS camera), ACC_02 (additional critical ACC cruise info). Add stubs with authoritative VW names for several other messages discovered during development and testing.