Add Coinbase balance and outstanding order balances to orders page

My text editor automatically removes extra whitespace at the end of lines.

Here is a screenshot of what this looks like.  Note the available balance can go negative because the page does not check of sufficient funds when setting up a sell order.

![screen shot 2014-02-26 at 8 23 46 pm](https://f.cloud.github.com/assets/2415796/2279187/17240876-9f67-11e3-9c09-0b56b8b62cf6.png)

Also, now that I'm taking another look at it, it would be nice to add a 3rd column which displays the price in USD.