Optimize a FlxFunction for Fesslix

It might be possible that a function of type FlxFunction can be optimized by reordering its terms. However, it is tricky to write an algorithm dealing with that. The information on how intensively to optimize a function should be given by default and by an optional argument at the end of a function.

Legacy of former blueprints for Fesslix

Legacies of former blueprints are listed here.

Setup some examples for Fesslix

Some examples are necessary in order to provide some startup for users.

Setup some tests for Fesslix

Some tests are necessary in order to ensure quality of the results during ongoing development.

Write documentation of existing elements for Fesslix

Write a documentation for existing elements.