This minor revision fixes the following issues:
- Improve send_http_request function to accommodate larger incoming packet. Previously incoming packet larger than 512 bytes is not handled correctly, which may affect weather query result.
- For OS 3.x using wired Ethernet and OS 2.3, replace EthernetENC library by UIPEthernet, which has more recent updates and fixes.
- For OSPi, replace wiringPi (now deprecated) by raspi-gpio (available on the latest Raspbian). This is used to enable internal pull-ups on sensor pins.