+Add locations of all well-known WSR-88D stations. (Source: Weather Clim...

Hi,

Please review these changes that add some compatibility to old nexrad Level-II archives. Some of these old archives didn't contain locations of radars in CDM archive when converted from Level-II to CDM using netcdf4-java library. For example, KOKX Level-II archive on Aug 13, 2004. 

Thank you and let me know if you have any questions.

-Jingyin Tang @UF