Added tests for the DGS examples in the CF Document.
* So far, only "point" and "timeSeries" types.
* H.2.3.2 is failing due to the presence of 2 lat and 2 lon axes. This is a bug in our CF implementation.
Merge branch '4.5.2' of https://github.com/Unidata/thredds into 4.5.2