Bug fixes:

    else {   }.

Improvements:

    star() and fill_star() functions to draw n-vertexed stars.
    tan(x), tangent of x degrees.
    Power operator ^ for arrays.
    Modulus for arrays.

Website:

    First full documentation.

Other:

    Renaming documentation/ ==> examples/
    Minor refactoring of the polygon drawing code.
    set_default_line_width ==> set_default_line_thickness
    Removing unnecessary prototypes from in-browser JS code.