v0.6.0

Release version 0.6.0

### Added
- Right parallel parking slot planner.
- Shrinking length of parallel parking slot test.
- SlotPlanner *Find Init Pose* `fip()` method based on BFS.
- Reverse approach for finding "entry pose". See Vorobieva2015 for more info.
- SlotSide (LEFT, RIGHT) and SlotType (PARALLEL, PERPENDICULAR) methods for
  SlotPlanner.
- Information used for sampling getter.
- Slot planner working for perpendicular parking scenario also.
- Matej's heuristic cost.
- Perpendicular slot planner proposal.
- Random samples logging.
- Rotate scenario script.
- Obstacles to SlotPlanner.

### Changed
- Test results plot.
- Make `T2` planner the default planner.
- Sampling info for different dimensions and angles of slot.
- Use reverse approach for finding init pose by default.
- Use `USE_GL` macro for build, in code.

### Fixed
- Car border.