added chiron_aitoff.js

a script that will produce an interactive Aitoff project and table of
the CHIRON data
spheres

Got a projection of two spheres on the overview page. the
chiron_aitoff.js script is outputting svgs to the div with the starmap
class.
legend now shows up

forgot the “.” before starmap initially
added css

to make the map pretty. required modifying stylesheet.css NOT to make
all paths steelblue with no fill