Graphics library
- added further pictures to the "building-automation\symbol-buttons" folder (pir-sensor, smoke-sensor)
- added the "buttons-set-blue", "buttons-set-white", and "pictograms" folders to the "building-automation\symbol-buttons" folder (the new folders contain the following pictures: abort, alert, antenna, auto, cctv, camera, camera-recording, cancel, cellphone, cooling, download, drying, fan, filter, filtering, heating, home, lights, locked, next, okay, pir, previous, refresh, reload, settings, smartphone, smoke-sensor, socket-eu, socket-usa, sunblinds-closed, sunblinds-opened, switch, thermometer-celsius, thermometer-fahrenheit, unlocked, upload)
- added further pictures (electric boiler) to the "electric-water-boiler" folder (electric-water-boiler2)
- added the "power-distribution-cabinet" and "generator-set" folders with pictures of power distribution cabinets and generator sets respectively
- added the "open-cooling-tower" folder to the "airconditioning" folder (the new folder contains the following pictures of cooling towers: open-cooling-tower1, open-cooling-tower2)
- added pictures of submersible pumps to the "pumps" folder (submersible-pump-left, submersible-pump-right)
- added pictures of humidity sensors to the "sensor" folder (humidity-sensor)
- added pictures of ammonia compressors to the "industrial-compressor" folder (nh3-compressor)
- added pictures of the following devices to the "gas" folder: gas meter, high pressure regulator, low pressure regulator, pneumatic control valve (gas-meter, high-pressure-regulator, low-pressure-regulator, pneumatic-control-valve)
- added pictures of metal barrels to the "other" folder (metal-barrel)