Amazon Echo support for groups

So the groups are now somewhat usable with an Amazon Echo. This is a bit of a workaround:
The group gets presented to the Echo as another fake light. For that to work you must manually enable this feature for every room by adding "exposeAsLight":"192.168.0.30" to the room in group.db (restart ha-bridge afterwards). Use the ip-address of your echo. No need to do that for other devices, because these can handle rooms directly. The fake light for the group will only be shown/usable to the specified ip-addresses.

src/main/java/com/bwssystems/HABridge/dao/GroupDescriptor.java

@@ -34,15 +34,16 @@ public class GroupDescriptor{
     @SerializedName("comments")
     @Expose
     private String comments;
-    @SerializedName("action")
-    @Expose
+    
     private DeviceState action;
-    @SerializedName("groupState")
-    @Expose
     private GroupState groupState;
+    
     @SerializedName("lights")
     @Expose
     private String[] lights;
+    @SerializedName("exposeAsLight")
+    @Expose
+    private String exposeAsLight;
     
     
     public String getName() {
@@ -136,4 +137,12 @@ public class GroupDescriptor{
 	public void setLights(String[] lights) {
 		this.lights = lights;
 	}
+
+	public void setExposeAsLight(String exposeFor) {
+		this.exposeAsLight = exposeFor;
+	}
+
+	public String getExposeAsLight() {
+		return exposeAsLight;
+	}
 }