add js versions of calendar widget based on https://github.com/heycarsten/ember-ui-calendar
move month component to coffee
move popcal over to coffee
rename popcal -> calendar
eui-calendar: fix navigation arrows not getting disabled. style disabled navigation arrows.
eui-calendar: style disabled dates, diable user selection on calendar and month components
fix bug introduced when converting eui-month to coffee
add style support to calendar
new build