Updates with mouse wheel scrolling and $().totemticker() functions.

...in.

- Tickers now all get the vTicker class for css markup.
- If a row height is specified that the items are now actually restricted to that height.  Add the following css to make longer items scroll properly.
        .vTicker li { overflow: hidden; }
- Added helper methods for easy scripting of the ticker.
        $(selector).totemticker("start");
        $(selector).totemticker("stop");
        $(selector).totemticker("previous");
        $(selector).totemticker("next");