New entities in /JK=ALL

[fredlcore]

Some LPB-systems have more than one heating system. BSB-LAN now supports listing the corresponding categories for each device via the /K!<addr> URL command to address a specific device. This does not apply to the JSON interface because /JK=ALL lists all the categories, irrespective of which device they belong to.
To address this issue, the newest master repo version adds several additional details such as dev_fam, dev_var and dev_model as well as dev_id which contains the destination device ID. Any of these can be used to further group the categories based on the chosen destination device. For example, if the user has selected model X, then you can extract the corresponding destination device ID for example, that is necessary to address that device.
If no filtering is added, /JK=ALL will most likely list every category several times (depending on the number of devices on the bus), because most of them will have a category for heating circuit 1, for example.