Multi-Mode about zylinderino HOT 3 OPEN

Idea for implementation:
Each mode has it's own independend framebuffer, and in the end they all get merged
(may be memory intensive? should be fine)

-> Possibility to overlay multiple instances of the same mode
(gotta name classes though!)
(I heard new and destroy is bad practice on embedded)

Multiple overlay modes:
Add (may produce a lot of white), Overwrite (may look jarring), Average (may be dark?)

from zylinderino.

Idea for stacking websites:
Make the Website global (or not, then index^=pointer), and when assembling the website, give each website-method an index at which the webpage-block inserts itself and increments the index

from zylinderino.

Have a linked list of pointers to modes, replacing the pCurrentMode pointer
this enables iterating over the linked list for webpage building, webhandling, updating, and most importantly:
determining the order of modes overlaid over each other

from zylinderino.