DataUtilities createFeature and encodeFeature methods from PropertyDataStore

The time devoted to explaining the method for encoding / decoding a feature from a String is a bit off topic; and now that we have two PropertyDataStore implementations I am going to refactor this common functionality out.

DataUtilities already has the following methods to support PropertyDataStore:

• DataUtilities.createType( String, String )
• DataUtilities.createType( String, String, String )
• DataUtilities.spec( FeatureType )

The goal is to end up with:

• DataUtilities.createType( String, String )
• DataUtilities.createType( String, String, String )
• DataUtilities.encodeType( SimpleFeatureType )
• DataUtilities.createFeature( SimpleFeatureType, String )
• DataUtilities.encodeFeature( SimpleFeature )

To review the format we are going for is:

SimpleFeatureType featureType = DataUtilities.createType("Contact","id:Integer,party:String,geom:Geometry:srid=4326");
SimpleFeature feature1 =  DataUtilities.createFeature( featureType, "fid1=1|Jody Garnett\\nSteering Committee|POINT (1 2)" );
SimpleFeature feature2 =  DataUtilities.createFeature( featureType, "2|John Hudson\\|Hapless Victim|POINT (6 2)" );
        
String spec = DataUtilities.encodeType(featureType);
String text = DataUtilities.encodeFeature(feature1);