common.populations: initial_values -> self.initial_values
solve the error: Index out of bound in lazyarray. The error occurs for example when one of the populations has a single neuron. Solution: define properly parameter_space in mock/populations.py, in the function _create_cells. Also adding an import of recording files in mock/__init__.py to properly clean the io
Adding the Izhikevich neuron model in the mock standard models