v1.1.0: added support for bidirectional kinematic analysis

• For kinematics analysis using a treadmill setup, the user can now specify the direction of animal movement in the config.yaml file (default: left to right.)
• Improved feature of kinematics analysis using a spontaneous walking setup: the walking direction is determined automatically based on the DLC output (bodypart names must contain a suffix of "L" or "R", e.g., "toeL".)