Added grayscale icon style to some themes
Reworked different theme background tiles and modified option menu
Minor changes in options menu and updated "Blueprint Grungy" BG
Merge remote-tracking branch 'origin/master' into burkhard/fonts

Conflicts:
	coffee/options.coffee
	coffee/wrapper.coffee
	css/main.css
	js/main.js
	js/template.js
	less/main.less
	less/theme.less
	less/variables.less
	template/option.hbs
cleanup and optimization