Ehlers MESA Adaptive Moving Average [LazyBear] Version 5

Updated version of LazyBear's MAMA indicator to version 5.

The MESA Adaptive Moving Average (MAMA) adapts to price movement based on the rate of change of phase as measured by the Hilbert Transform Discriminator. This method features a fast attack average and a slow decay average so that composite average rapidly ratchets behind price changes and holds the average value until the next ratchet occurs. Consider FAMA (Following AMA) as the signal.