Added missing screenshots (#2025)

* Update README.md

* add missing screenshots to readme

* Delete instrument_dust_sensor_view.png

* Delete instrument_gas_sensor_view.png

* Add files via upload

* Delete instrument_gas_sensor_view.png

* Add files via upload

* Add files via upload

* Add files via upload

Author: Hasala123

README.md

@@ -84,6 +84,11 @@ This repository holds the Android App for performing experiments with [PSLab](ht
      <td><img src="/docs/images/instrument_compass_view.png" width = "500"></td>
      <td><img src="/docs/images/instrument_thermo_view.png" width = "500"></td>
     </tr>
+     <tr>
+     <td><img src="/docs/images/instrument_sensors_view.png" width = "500"></td>
+     <td><img src="/docs/images/instrument_gas_sensor_view.png" width = "500"></td>
+     <td><img src="/docs/images/instrument_dust_sensor_view.png" width = "500"></td>
+    </tr>
   </table>
   <table>
     <tr>