L-Breeder Help: implementation of mutations

# ---- How mutation works ----

## Introduction:

## Parametric Mutations:

These mutations modify the parameter associated with an L-system character. For example, F(90), which draws a line which is 90% of the default length, may mutate to F(105), thus making this particular line longer. Similarly, F on its own may mutate to F(95), giving a 5% decrease in length of the line in question, or F(95) may mutate to F on its own, giving an increase in length.

## Algorithmic Mutations: