Add option to use ISO week format

Contains a breaking change!

The calendar now starts on sunday instead of monday. To revert the behaviour so it starts on monday instead you can either set this attribute on the calendar:

calendar-use-iso-week="true"

Or set it globally via moment:

moment.locale('en', {
    week : {
        dow : 1 // Monday is the first day of the week
    }
});

0.2.0

New features:
-Allow clicking a month / day to drilldown into that particular view
-Disable editable and deleteble buttons per event

0.1.0

Initial release