Ir-sim

Big Version.

Not compatiable with previous version

- Reformulate the whole project framework, all the objects are developed by the object base
- Using shapely to construct the geometry for the robot and obstacles
- Reconstruct the YAML interface
- Add the behavior library for the objects
- Add the object factory to create the objects
- Add env logger to record and print the environment status

Backup of version 1

Next will be version 2，a big version that is not compatible with version 1

- Add the function to change the edgecolor
- Add repeat mkdirs
- Fix some bugs

- Fix some bugs
- Add the collision mode 'unobstructed'
- Add draw box function
- Add radius for obstacle

- Fix some bugs
- Add features for obstacles.

Add map obstacles;
Add different car models;
Fix bugs of reset robot;