added fractals

added 5 pixel border around canvas
added fractals:
-koch-snowflake
-koch-antisnowflake
-koch-island
-cantor-set
-levy-curve
-some own ones

enabled custom initial data for fractal patterns

fixed animated fractals iterating 1 more time than non-animated

removed old comment from updateDimensions function

#menu is now below canvas

changed canvas position to fixed