Set up Yocto for Raspberry Pi

[isch4196]

Task: Set up the Yocto for Raspberry Pi to make life easier in the future

• [x] Create a yocto build for rpi 3b
• [x] Flash the image to an SD card
• [x] Ensure the Raspberry Pi boots up with the new custom image
• [x] Add wifi connection to the image
• [x] SSH into rpi
• [x] Add root password

Status: Complete. See comment below.

[isch4196]

Issue complete with commit 54923b4b4bb6b1891cab131d29abdaa4dadebf3c. Everything went relatively smoothly.