ESP8266 Adapter

Solves the two problems that stop most people using a bare ESP-01 module: its 2 mm pin spacing does not fit a breadboard, and it needs clean 3.3 volts at a current an Arduino's regulator cannot supply. The adapter provides proper regulation and standard 2.54 mm pins, turning an awkward module into something you can prototype with. Some versions also handle level shifting for 5V serial lines. Proper 3.3V regulation sized for the module's current spikes; Converts 2 mm pin spacing to breadboard-friendly 2.54 mm; Removes the most common cause of ESP-01 instability; Some versions include serial level shifting