BoM Weather Hubitat driver

Hubitat Driver for Australian weather data (observations and forecasts) from your local weather station at the Bureau of Meteorology (BOM).

1. Add bomdriver.groovy and bomdriver_ftpchild.groovy to your Hubitat as two new Drivers (under Drivers Code)
2. Add a new device for weather to your Hubitat, set device Type to your User driver of 'BoM Weather'
3. Configure your ID and WMO numbers:
   1. Visit BoM Observations and find your closest weather station
   2. Once you've browsed down to the weather station, your URL will look something like: http://reg.bom.gov.au/products/IDV60901/IDV60901.94866.shtml
   3. Copy IDV60901 and paste it into the Observation ID number field
   4. Copy 94866 and paste it into the Observation WMO number field
   5. Visit BoM Weather Data Feeds - Long form and find your state, then click on the XML link under Precis
   6. Your URL will look something like: ftp://ftp.bom.gov.au/anon/gen/fwo/IDV10753.xml
   7. Copy IDV10753 and paste it into the Forecast Precis ID number field
   8. Search the XML file for your local station (it's a large file, use text search for eg. "Melbourne" or "Tullamarine"), and you should find the line that looks something like <area aac="VIC_PT042" description="Melbourne" type="location" parent-aac="VIC_PW007">
   9. Copy VIC_PT042 and paste it into the Forecast Precis AAC number field (make sure you copy the aac not the parent-aac value)
4. Set the polling interval... if the weather station only updates every 30mins, set it to 5,35 to refresh every xx:05 and xx:35 mark of each hour (the BoM hasn't always refreshed its data right on xx:00/xx:30, so you might miss it if you set it to that). Note that forecasts are only updated twice a day, and will only update (on the times you've set) once the 'forecastnextdate' has passed.
5. Enable auto poll, and enjoy :)

References: Polling function modified from Scottma61's WU driver