v1.0.2: Improved Fortran Backend Functions and PyCoBi integration

• fixed bug in fortran backend where the NPAR parameter for Auto-07p files was not properly set
• improved code readability in fortran backend
• moved selection of output variables from the results of a numerical simulation from the backend to the computegraph, thus reducing the amount of variables that had to be passed between the different classes
• after each simulation, the value of all state variables in the compute graph is updated to the value at the final simulation step
• added functionalities to the CircuitTemplate that allow to remember the state of all network variables from a previous simulation, even if a new backend is chosen for function generation or more simulations