Time of plotting

[MarcinKosinski]

I made a new folder worth_seeing_images just to show you how we can speed up our Turbo Turtle.

When he is not hided he draws milion of graphs, check:

• worth_seeing_images/bad_snowflake_without_hide.html

But when he is hided, he simply just draw a several lines, check:

• worth_seeing_images/snowflake_with_hide.html

[andromeda14]

I added comment about it to vignettes :)

[MarcinKosinski]

Good job. I've seen it already :)