Equalize the mass of the left and right
Unification of the topic name and the real machine.
旋回性能が極端に悪い問題に対して暫定対処
Added the virtual links
Fixed a problem that the direction of rotation of the robot is in the reverse
Merge pull request #8 from open-rdc/improve-odom-error

Improved the turning performance of i-Cart mini in the gazebo simulator