Allow events to be referenced in a hierarchical structure.  All parts in the
hierarchy will be appended together using ":" as the separator
window: {
scroll: 'onScroll',
resize: 'onResize'
}
will return as
{
'window:scroll': 'onScroll',
'window:resize': 'onResize'
}
}
function normalizeEvents(events, rtn, prefix) {
        rtn = rtn || {};
        if (prefix) {
            prefix += ':';
        } else {
            prefix = '';
        }
        var value, valueType;
        for (var key in events) {
            if (events.hasOwnProperty(key)) {
                value = events[key];
                valueType = typeof value;
                if (valueType === 'string' || valueType === 'function') {
                    rtn[prefix + key] = value;
                } else if (value) {
                    normalizeEvents(value, rtn, prefix + key);
                }
            }
        }
        return rtn;
    }