v0.3.0 Pulled Pork

This release contains the improvements for milestones 0.2.0 and 0.3.0.

New Features

Built-in HTTP configuration and control page
Support for up to 4 servos on one servo driver
Stepper driver supports 32-bit microstepping via JSON (via TCP) and theoretically UDP packet
The bounds of the servo duty cycle are now changeable via UDP packet

GPIO code foregoes using Espressif's gpio_output_set in favor of much faster direct register manipulation, allowing us to phase out code based on internet demo code

Stepper motor driver sanitizes negative wait_time input
Fixed a race condition that caused stops to crash the stepper motor driver
Fixed a condition where some devices couldn't connect to the driver's softAP broadcast mode
The 5us motor driver timer resolution no longer causes a watchdog timer reset

Brushed motor driver has been removed from the builds since it is low priority and will not be fully implemented for a long, long time
The singular servo driver (servo_driver.c) has been depreciated and removed from the builds since it has been replaced in the product line by the quad servo driver
Improvements to the stepper driver hardware design have eliminated a crash or two involving the WiFi controller
The built-in website control page only supports sending commands to the first servo motor in the 4-servo array, and uses outdated values for the calculation of the command values