add toggle and styles for hyphenation and justification
add SVG icons for new justification and hyphenation options
add utility to covert ISO-639-2 codes to IANA for hyphenation dictionaries
convert hard coded lang values from ISO-639-2 to IANA
use new utility function to convert language codes just before they hit the html
fix text generator so html lang attributs use IANA codes
merge hyphenation into justification toggle
redraw justification toggle icon to be proportionally similar to other toggles
updating images, fixed sizes