ProtoFeature扩充，属性中支持数据、对象、数组与对象的相互嵌套,允许feature中的形状、属性为空

Author: codingmiao

giscat-vector/giscat-vector-pojo/src/main/java/org/wowtools/giscat/vector/pojo/Feature.java

@@ -42,6 +42,10 @@ public Feature(Geometry geometry) {
         this.geometry = geometry;
     }
 
+    public Feature(Map<String, Object> properties) {
+        this.properties = properties;
+    }
+
     public Feature() {
     }