v0.4.0

Release version 0.4.0

### Added
- Workaround to not working `fe()` for perpendicular parking slot.
- Return maneuver as vector of BicycleCars.
- `FORWARD_PARKING` macro.
- Shrink to perfect length when too big parking slot.

### Fixed
- Possible goals for right parallel parking slot.

### Changed
- Make `fe_parallel` faster (use geometric computation instead of steer).