Radial ocean with island test problem

Converted example of the radial ocean with an island from the AWR 2011 paper and compared with the results in the paper and those archived at http://depts.washington.edu/clawpack/links/awr11/.

Results are not identical but very close...
![compare_gauges](https://cloud.githubusercontent.com/assets/720122/5386191/4dc1baba-8097-11e4-80ec-16b43fe6b381.png)