v0.3.0

Release version 0.3.0

### Added
- Python plot procedures:
    - boxplot for time, cost, cusp,
    - histogram plot for time, cost, cusp,
    - bar plot for error rate.
- Benchmark scenarios from Elbanhawi, Mohamed, Milan Simic, and Reza Jazar.
  “Randomized Bidirectional B-Spline Parameterization Motion Planning.” IEEE
  Transactions on Intelligent Transportation Systems 17, no. 2 (February 2016):
  406–19. https://doi.org/10.1109/TITS.2015.2477355.
- Script to print results from measured scenarios.
- Test scenario script.

### Changed
- Update python plot scripts.
- Use numbers on x axis (x ticks) for plots.
- Real-world scenarios.
- Rename heuristics.

### Deprecated
- Python plots feature deprecates all gnuplot plots.