Swoosh2 New Readme

[TheMaverickProgrammer]

There are many new changes to the way Swoosh2 renders an activity and supports multiple renderers that can be switched to on-the-fly. This supports a new way of drawing that will require a section on its own to educate new users as well as a section for old Swoosh users to migrate quickly from the old method.

The Readme can be broken up into a small book here in the repo.