Added two new optical tactile sensors (DIGIT and DigiTac) of the two most popular types, Gelsight-style (image-shading based) and TacTip-style (marker based).
Added MG400 - an inexpensive 4-DoF desktop robot arm.
Added a new environment surface_follow-v2 (for 4-DoF robot arm).
Tactile Gym 2.0
New features: