* Fix syntax error in Honda Civic Touring comment
Add escaping to nested quotes in comment.
* Convert caddilac_ct6_powertrain.dbc to UTF-8
Fixes decoding issue of the degrees rune.
* Convert gm_global_a_powertrain.dbc to UTF-8
Fixes decoding issue of the degrees rune.
* Adjust Volt's speed scaling
Making openpilot's reading to match Volt's dashboard.
* Change Volt's brakes to reporting raw values
Instead of percentages.
For consistency with Panda's safety state machine,
that allows for pedal stickiness (reporting near-zero
values with brake pedal is unpressed).