* Leaky_relu / prelu / softplus / mish * added tests * updated bench * remove torch refs, add init to PReLU * added arvix reference to mish * added missing docs
* Add Step, ELU, SELU, Swish activation functions This commit adds the Step, ELU, SELU and Swish activations functions * add to the docs * review
* added leaky_relu relu6 softplus elu celu logsigmoid * minor fixes for docstring and benchmark imports * fixed elu implementation and added tests * added tests for optional param, changed leaky_relu param to fit pytorch documentation