Added IC 7485 and 4 analog functions

I have added one 7485 IC ( at the bottom of 7400 IC family script) .All the functioning logic of IC is correct , only issue is on output pin 5 and 7 the ORing operation using the built in OR gates raises an error

I have also added short handy functions in Algorithm / AnalogFormulas script to calculate the series and parallel resistance and capacitance