Add prototype assembly instructions

[NBAPJ]

Do you any instructions or guides on how I could build one of these myself.

[nitz]

Excellent! This is what I like to hear! Yes, I have some scrawled notes that I've been meaning to type up into a more coherent guide, so I will take that opportunity to soon do so.

In short, there shouldn't be any real "gotchas", but do make sure that you space the LCD apart from the bridge with something when you solder it (and likely you'll want to put some electrical tape or similar over the SD card slot. Being metal, I was afraid of shorting the pins to the Pitaya Go.)