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/GroupRepository.java

@@ -115,6 +115,17 @@ public class GroupRepository extends BackupHandler {
 		return theReturnList;
 	}
 
+	public List<GroupDescriptor> findVirtualLights(String anAddress) {
+		List<GroupDescriptor> list = new ArrayList<GroupDescriptor>();
+		for (GroupDescriptor group : groups.values()) {
+			String expose = group.getExposeAsLight();
+			if (expose != null && expose.contains(anAddress)) {
+				list.add(group);
+			}
+		}
+		return list;
+	}
+
 	public GroupDescriptor findOne(String id) {
     	return groups.get(id);	
     }