Add unit test for reading and writing GeoRSS. Includes bug fix for Bridjs support for String arrays and the removal of LayerCanCreateField check because the GeoRSS driver return false even though it needs to create fields when writing
Exclude georss, gpx, sosi from the can create field check due to gdal bug
Merge pull request #334 from jericks/ogr_3

Add ogr GeoRSS unit test.  Fixes JIRA issue GEOT-4652.