Add entry details to table views by using a cell with a subtitle.

Show a combination of the Username and URL fields, if set, for each entry displayed.  e.g.

myuser
www.example.com
myuser @ www.example.com

Perhaps an answer to issue #220.  Tested on iOS 7 and 6.1 in simulator:

![screen shot 2013-11-02 at 1 48 05 pm](https://f.cloud.github.com/assets/1621581/1459686/fcd76e04-43ef-11e3-9ac1-f558bad05dd1.png)

![screen shot 2013-11-02 at 1 48 44 pm](https://f.cloud.github.com/assets/1621581/1459687/0674f012-43f0-11e3-847a-3f31400974cc.png)