add SVG icons for new justification and hyphenation options
add toggle and styles for hyphenation and justification
change CSS to two letter language codes
convert hard coded lang values from ISO-639-2 to IANA
add utility to covert ISO-639-2 codes to IANA for hyphenation dictionaries
use new utility function to convert language codes just before they hit the html
fix text generator so html lang attributs use IANA codes
add webfont resource files for Libertine font family
add config option and styles for Libertine font family
avoid over-riding font family preference if the font has good glyph support
Merge branch 'typography-libertine' into devel
Merge branch 'typography-hyphenation' into devel

Conflicts:
	app/css/bible.css