2.13.0

• added implementation of surface tension method: Jeske et al. "Implicit Surface Tension for SPH Fluid Simulation", ACM Transactions on Graphics, 2023 (thanks to Stefan Rhys Jeske)
• bugfix: in emitter scenes now all particles are reset correctly
• updated PositionBasedDynamics
• updated GenericParameters
• added citation file
• fixed rigid body colors in visualization
• fixed export of static rigid bodies
• added missing include
• fixed addKeyFunc in Python interface
• added a CMake option for each tool so that the build can be disabled/enabled
• all scene file parameters are now GenericParameters
• updated Python examples
• added ParameterParser tool which can generate a scene file json schema or an example scene file with all parameters
• added json schema for scene files
• fixed OBJ meshes
• updated glfw
• updated pybind11