Rain gauge / meter

This is a remix of TomasRudh 's very good rainmeter. I have modified the design in the following ways:
- Added a sensor slot to fit the Sonoff SNZB-04 door sensor (removed from it's original case). You can now use either the Aqara or the Sonoff zigbee door sensors to make this rain gauge.
- Added a cover for the Sonoff snzb-04 sensor slot (raingauge_snzb-04_sensor_slot_cover.stl) as the sensor has been removed from it's original case.
- Modified the screw hole sizes so I could use the stainless steel screws I already had.
- Created a fence post / wall bracket to mount the rain gauge on (raingauge_fence_post_bracket.stl).
- Created a base to mount the rain gauge on a solid base (raingauge_solid_base_bracket.stl). It allows the water from the tipping bucket /cradle to flow out to the side.

The funnel and cradle are as per TomasRudh 's original. I just carefully drilled out the two holes in the side of the funnel a bit to fit my screws. I also used the same 12mm x 2mm neodymi